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1
Bariyeva, Aizat. "Optimalizace adsorpce kyseliny ferulové na různých typech adsorbentů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401937.
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This thesis deals with optimalization processes of adsorption of ferulic acid on different types of sorbents. Specifically, was used the activated carbon as a sorbent of heterogeneous character and Amberlyst A-21 and Amberlit XAD-16 as macroporous polymer sorbents. The ferulic acid is fully characterized in the theoretical part and are discussed the problems of adsorption processes. To determination of the phenolic acid were used UV-VIS and HPLC instrumental methods. The main aim of the experimental part is to optimize various parameters of adsorption, including the construction of adsorption isotherms, determination of maximum adsorption capacity of individual sorbents, study of kinetics and mechanisms of adsorption. Determination of the influence of salt was studied to assess the impact of the inorganic salts on the ferulic acid adsorption capacity. Based on these parameters, was carried out determination of an optimal pH value on 3, with an optimal adsorbent load (m/V ratio = 0,009 gml-1) and a contact time of 50 min for all three adsorbents. Equilibrium studies described by adsorption isotherms and the Langmiur model fitted the best, and the maximum adsorption capacities were determined for all three sorbents with 150,4 mgg-1 for activated carbon, 209,1 mgg-1 for Amberlyst A-21 and 82 mgg-1 for Amberlyte XAD-16. In the study of kinetic models was selected pseudo-second model for all three adsorbents, which correlated with the results obtained by the Langmuir isotherm. The decrease in adsorption capacity in the determination of NaCl influence was 4 % for activated carbon, for macroporous polymer sorbents was decreased by 52 % and 55 % for Amberlyst A-21 and Amberlyt XAD-16 respectively. In a selectivity test under optimized conditions, adsorption strength increased in the order of sinapic acid ferulic acid p-coumaric acid for polymeric sorbent XAD-16 and activated carbon. For the A-21 sorbent the adsorption strength increased in the order of p-coumaric acid ferulic acid sinapic acid. The results of the work indicate the suitability of all three sorbents for the phenolic acid adsorption.
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Tang, Shuo. "DEVELOPMENT OF NOVEL TEMPERATURE RESPONSIVE POLYMERIC SORBENTS AND THEIR APPLICATIONS IN WATER REMEDIATION." UKnowledge, 2019. https://uknowledge.uky.edu/cme_etds/101.
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Water remediation utilizing sorption has found strong interest due to its inexpensiveness, universal nature and ease of operation. In particular, thermo-responsive sorbents consisting of N-isopropylacrylamide (NIPAAm) offer significant potential as “smart” and advanced materials to remove multiple aqueous pollutants. NIPAAm exhibits excellent thermo-responsiveness, which senses the external temperature variation and changes its swelling and sorption behaviors in a sharp and rapid manner. At the beginning of this work, an extensive review of literature has been compiled to provide a summary of NIPAAm-based thermo-responsive sorbents in water/wastewater remediation applications.
Initially, we developed a novel approach to synthesize and characterize NIPAAm copolymeric hydrogels. Four different polyphenolic crosslinkers including curcumin multiacrylate (CMA), quercetin multiacrylate (QMA), 4,4’-dihydroxybiphenyl diacrylate (44BDA) and chrysin multiacrylate (ChryMA) were successfully incorporated into crosslinked hydrogels. Their temperature responsiveness and lower critical solution temperature (LCST) were characterized using swelling studies and differential scanning calorimetry (DSC). Increasing the crosslinker content resulted in a significant decrease in the swelling ratio and LCST, which was due to the increased crosslinking and hydrophobicity introduced by the polyphenolic crosslinkers.
We also demonstrated the application of two sets of aforementioned crosslinked hydrogels (NIPAAm-co-CMA and NIPAAm-co-44BDA) as effective gel sorbents to capture phenol as a model contaminant. Temperature-dependent sorption was evaluated through a binding study of phenol at 10°C and 50°C. Significant enhancement in the sorption was observed at 50°C, and this can be attributed to the phase transition induced hydrophobic interactions between the copolymer gel and phenol. Moreover, the obtained hydrogels possessed facile and efficient regeneration ability in water at 10°C, without requiring harsh solvent treatment or high energy input.
Building on the sorption behavior observed with crosslinked NIPAAm hydrogels, we extended the investigation to linear copolymer systems, and these were demonstrated as a temperature responsive flocculants. Here, NIPAAm copolymers consisting of 2-phenylphenol monoacrylate (2PPMA) were successfully developed as smart flocculants to remove metal oxide nanoparticles (e.g., Fe3O4, CeO2, TiO2). The incorporation of 2PPMA enhanced the flocculation at temperatures above the LCST (e.g., 50°C), which was due to the combined hydrophobicity of 2PPMA and NIPAAm. Overall, NIPAAm-based sorbents have a variety of applications in aqueous pollutant removal and are a promising class of materials for cost-effective water remediation technology.
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Pan, Lin. "In-situ Infrared Study of Amine-Functionalized Polymer Sorbents for CO2 Capture." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427207675.
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Henning, D. S. (Dominique S. ). "Adsorption of bilirubin of polymer sorbents." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72026.
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Adsorption of bilirubin from aqueous buffer (pH = 7.8) by PVP, by cholestyramine and by amino acid containing pendants, which have been immobilized onto a polystyrene (Merrifield) resin or a water swellable polyamide resin using the solid phase peptide synthesis methods, have been studied. The adsorption of bilirubin by the pendants on the Merrifield resin was minimal while PVP and cholestyramine adsorbed some bilirubin. However, the best adsorbents were the immobilized amino acids on a water swellable polyamide resin.A systematic study of the effect of the changes in the amino acid composition of the pendant, both in type and number, on the adsorption by the polyamide resins indicates that the change density, contributed by the R groups of the amino acids in the pendant, is the major factor in the adsorption process. However, some adsorption also occurs at the (alpha)-amino groups. Effects due to the conformation of the peptide chains are also indicated. Of the resins studied, those with peptide pendants containing arginine or lysine form the most efficient adsorbents for bilirubin in aqueous buffer solution.
Studies of the adsorption of bilirubin from bilirubin solutions containing bovine serum albumin as well as studies of desorption of bilirubin from the resins by bovine serum albumin indicates that some resins containing arginine in the pendants can successfully compete with albumin. Stoichiometric binding constants obtained for the polyamide resins by the method of Klotz are of the order of 1 x 10('3) M('-1) to 86 x 10('3) M('-1). These binding constants are lower than that of the reported values for the first binding site of bilirubin on albumin by a factor of 10('1) to 10('4) and lower by a factor of 10 to 10('3) than the values reported for the second binding site.
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Ritt, Cody. "Assessment of Molecularly Imprinted Polymers as Phosphate Sorbents." Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28417.
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Wastewater effluents and agricultural runoff are major sources of phosphorus overloading in surface waters. Phosphorus overloading ignites eutrophication, which devastates aquatic ecosystems. On the other hand, phosphorus, which is currently produced from phosphate rock, is a critical component of fertilizer mixes. However, the world is predicted to face a shortage of phosphate supply beyond 2033 due to unsustainable mining. This research aims to develop a polymeric sorbent that recovers low-concentration phosphorus for eutrophication prevention and fertilizer reuse. Available polymer-based products have underwhelmed expectations by having poor selectivity or lacking appropriate biodegradation rates. This research identified molecularly imprinted polymers (MIPs) as possible sorbents for overcoming the deficiencies of reported technologies. Screening of several MIPs resulted in one potentially feasible MIP for phosphate sorption. Further studies showed a sorption capacity of ~28 mg PO43--P/g and partial phosphate-selectivity. Potential phosphate removal mechanisms were identified, providing foresight into MIPs? viability as phosphorus sorbents.North Dakota Department of Commerce (NDDoC Grant #: 14-11-J1-70); the National Institute of Food and Agriculture (NIFA-USDA Grant #: 2015-607022-22996); North Dakota Water Resources Research Institute (NDWRRI)
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Meyer, Christoph. "Polymer-based chromatographic sorbents synthesis, characterization, and application /." [S.l. : s.n.], 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11947869.
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Jin, Hailiang. "Development of Polymeric SO2 Resistant Coating for Solid Amine Sorbent." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428180854.
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Li, Fuyue. "Amine-functionalized polymeric hollow fiber sorbents for post-combustion CO2 capture." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52991.
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Polymeric hollow fiber sorbents were functionalized with amine moieties for improving the carbon dioxide sorption capacity from flue gas to reduce the greenhouse gas emissions from coal-fired power plants. Three different experimental pathways were studied to form the amine-functionalized hollow fiber sorbents. Aminosilane functionalized cellulose acetate (CA) fibers, polyethyleneimine (PEI) functionalized polyamide-imide (PAI, Torlon®) fibers and PEI post-infused and functionalized Torlon®-silica fibers were formed. CO2 equilibrium sorption capacity data were collected by using the pressure decay sorption cell and thermal gravimetric analyzer. Other physio-chemical properties of the amine-functionalized fiber sorbents were characterized by using fourier-transform infrared spectroscopy, elemental analysis, and scanning electronic microscopy. Different reaction conditions were studied on the effect of sorption isotherms. Aminosilane-CA fibers were the first proof-of-concept for forming the amine functionalized polymer hollow fibers. PEI-PAI fibers were designed as a new method to reach enhanced sorption capacities than Aminosilane-functionalized CA fibers. PEI post-infused and functionalized Torlon®-silica fibers have further enhanced sorption capacity; however they easily degrade with similar reaction for forming PEI-PAI fibers. Lumen-side barrier layers were created successfully via post-treatment technique of using the crosslinked Neoprene® polymer onto PEI-functionalized PAI fibers. PEI-functionalized PAI fibers also have good cyclic stability and low heat of sorption.
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Li, Fuyue. "Amine-functionalized polymeric hollow fiber sorbents for post-combustion CO₂ capture." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53119.
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Polymeric hollow fiber sorbents were functionalized with amine moieties for improving the carbon dioxide sorption capacity from flue gas to reduce the greenhouse gas emissions from coal-fired power plants. Three different experimental pathways were studied to form the amine-functionalized hollow fiber sorbents. Aminosilane functionalized cellulose acetate (CA) fibers, polyethyleneimine (PEI) functionalized polyamide-imide (PAI, Torlon® fibers and PEI post-infused and functionalized Torlon®-silica fibers were formed. CO₂ equilibrium sorption capacity data were collected by using the pressure decay sorption cell and thermal gravimetric analyzer. Other physio-chemical properties of the amine-functionalized fiber sorbents were characterized by using fourier-transform infrared spectroscopy, elemental analysis, and scanning electronic microscopy. Different reaction conditions were studied on the effect of sorption isotherms. Aminosilane-CA fibers were the first proof-of-concept for forming the amine functionalized polymer hollow fibers. PEI-PAI fibers were designed as a new method to reach enhanced sorption capacities than Aminosilane-functionalized CA fibers. PEI post-infused and functionalized Torlon®-silica fibers have further enhanced sorption capacity; however they easily degrade with similar reaction for forming PEI-PAI fibers. Lumen-side barrier layers were created successfully via post-treatment technique of using the crosslinked Neoprene® polymer onto PEI-functionalized PAI fibers. PEI-functionalized PAI fibers also have good cyclic stability and low heat of sorption.
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Fayemi, Omolola Esther. "The development of platinum and palladium-selective polymeric materials." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002964.
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The adsorption and separation of platinum(IV) and palladium(II) chlorido species (PtCl₆²⁻ and PdCl₄²⁻) on polystyrene-based beads and nanofibers as well as silica microparticles functionalized with polyamine centres derived from ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetriamine (TETA) and tris-(2-aminoethyl)amine (TAEA) is described. The functionalized sorbent materials were characterized by using microanalysis, SEM, XPS, BET and FTIR. The nanofiber sorbent material functionalized with ethylenediamine (F-EDA) had the highest loading capacity which was attributed to its high nitrogen content (10.83%) and larger surface area (241.3m²/g). The adsorption and loading capacities of the sorption materials were investigated using both the batch and column studies in 1 M HCI. The adsorption studies for both PtCl₆²⁻ and PdCl₄²⁻ on the polystyrene-based sorbent materials fit the Langmuir isotherm while the silica-based sorbents fitted the Freundlich isotherm with R² values > 0.99. In the column experiment the highest loading capacity of Pt and Pd were 7.4 mg/g and 4.3 mg/g respectively on the nanofiber sorbent material based on ethylenediamine (EDA). The polystyrene and silica-based resins with triethylenetetramine (TETA) functionality (M-TETA and S-TETA) showed selectivity for platinum and palladium, respectively. Metal chlorido complexes loaded on the sorbent materials were recovered by using 3% m/v thiourea solution as teh eluting agent with quantitative desorption efficiency under the selected experimental conditions. The separation of platinum from palladium was partially achieved by selective stripping of PtCl₆²⁻ with 0.5 M of NaClO₄ in 1.0 M HCI with PdCl₄²⁻ was eluted with 0.5 M thiourea in 1.0 M HCI. The selectivity of the M-TETA and S-TETA sorbent materials was proved by column separation of platinum(IV) and palladium(II), respectively, from synthetic solutions containing iridium(IV) and rhodium(III). The loading capacity for platinum on M-TETA was 0.09 mg/g while it was 0.27 mg/g for palladium on S-TETA.Acrobat PDFMaker 10.1 for Word
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Wang, Sihan. "Preparation And Modification Of Amine-Functionalized Solid Sorbents For CO2 Adsorption And SO2 Resistance." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460413002.
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Nestora, Sofia. "Molecularly imprinted polymers as selective sorbents for recognition in complex aqueous samples." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2346/document.
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Dans cette thèse, nous avons démontré la faisabilité de la préparation de polymères à empreinte moléculaires (MIP) hautement sélectifs pour la reconnaissance dans des matrices aqueuses complexes avec des applications dans les cosmétiques et en technologie alimentaire. Les MIP (de l'anglais molecularly imprinted polymers) sont des récepteurs synthétiques comparables aux anticorps, qui sont synthétisés par co-polymérisation de monomères fonctionnels et réticulants en présence d'un gabarit moléculaire. Leurs propriétés de reconnaissance moléculaire, associées à leur grande stabilité, robustesse mécanique, faible coût et leur synthèse facile les rendent extrêmement intéressants comme matériaux de capture sélective, avec des applications dans les séparations analytiques, la détection et la vectorisation des médicaments. Cependant, leur reconnaissance sélective dans des milieux aqueux reste toujours problématique et c'est l'une des raisons de leur expansion commerciale restreinte. Dans une première partie, nous avons développé un MIP fonctionnant en milieu aqueux pour son application comme ingrédient actif dans un déodorant. Les odeurs corporelles sont principalement dues à des acides gras volatils générés à partir de leurs précurseurs, des conjugués de glutamine par des enzymes hydrolytiques produites à partir de bactéries présentes sur la peau. La plupart des anti-transpirants et des déodorants actuellement commercialisés contiennent des sels d'aluminium et des agents antibactériens non spécifiques, respectivement. Cependant, l'utilisation extrêmement étendue de ces produits nécessite des solutions alternatives en ce qui concerne divers problèmes (environnement, respect de l'écosystème de la peau, toxicité, etc.). Pour cette raison, un MIP a été synthétisé pour capturer les précurseurs conjugués de glutamine afin qu'ils ne soient plus disponibles aux bactéries, empêchant ainsi leur transformation en composés malodorants. Afin de générer des liaisons sélectifs dans des environnements aqueux, un monomère à base d'amidinium qui peut former une interaction électrostatique stoechiométrique forte avec les groupes carboxyle sur le gabarit moléculaire a été synthétisé. Le MIP, mélangé dans une formulation dermo-cosmétique, pourrait capter sélectivement les précurseurs conjugués de glutamine, au milieu d'une multitude d'autres molécules présentes dans la sueur humaine. En outre, le MIP n’affecte pas les bactéries de la peau, ouvrant la voie à des déodorants innovateurs de nouvelle génération, moins problématiques pour la santé. Dans une deuxième partie, nous avons développé une procédure rapide et efficace basée sur l'extraction en phase solide à empreinte moléculaire (MISPE) pour la purification sélective de la bétanine et de son stéréoisomère l’isobétanine à partir d'extraits de betterave. La bétanine est un pigment naturel ayant un fort pouvoir antioxydant et dont les propriétés pharmacologiques sont de plus en plus étudiées. Ce pigment est actuellement utilisé comme simple colorant alimentaire. Dans notre étude, l'acide dipicolinique a été utilisé comme gabarit moléculaire pour la synthèse de MIP, en raison de sa similarité structurelle avec le groupe chromophore de la bétanine. Les procédures MISPE ont été optimisées permettant l'élimination presque complète des glucides issus de la matrice végétale ainsi que la majorité des protéines, ce qui permet d'obtenir un rendement élevé d'extraction de la bétanine / isobétanine en une seule étape. De plus, toute la procédure d'extraction a été réalisée dans des solvants respectueux de l'environnement, tels que l'éthanol ou l'eau. Pour conclure, nous sommes convaincus que ce travail pave le chemin au développement d'une nouvelle génération des MIP fonctionnant en milieu aqueux avec des propriétés de reconnaissance améliorées dans des environnements complexes, qui pourra s'appliquer également à d'autres domaines biotechnologiques et biomédicauxIn this thesis, we have demonstrated the feasibility of preparing highly selective molecularly imprinted polymers (MIPs) for recognition in complex aqueous matrices with applications in cosmetics and food technology. MIPs are synthetic tailor-made receptors, with binding affinities and specificities comparable to those of natural antibodies. Their molecular recognition properties, combined with their high stability, mechanical robustness, low cost and easy synthesis make them extremely attractive as selective capture materials with applications in analytical and preparative separations, sensing and drug delivery, among others. However, their selective recognition in aqueous samples still remains problematic and is one of the reasons for their so far lilited commercial expansion. In the first part, we developed a water compatible MIP for its application as an active ingredient in a deodorant. Body odors are mainly due to volatile fatty acids generated from their glutamine conjugate precursors by hydrolytic enzymes from bacteria present on the skin. Most currently marketed anti-perspirants and deodorants contain, respectively aluminum salts and unspecific antibacterials. However, the extremely wide use of these products requires alternative solutions with regard to various problems (environmental, respect of skin ecosystem, toxicity, etc.). For this reason, a MIP was developed to capture the glutamine conjugate precursors so that they are no longer available to the bacteria, thus preventing their transformation to malodorous compounds. In order to generate binding selectivity in aqueous environments, an amidinium-based monomer which can form a strong stoichiometric electrostatic interaction with the carboxyl groups on the template, was synthesized. The MIP, blended in a dermo-cosmetic formulation, could capture selectively the glutamine precursors, amidst a multitude of other molecules present in human sweat. Furthermore, the MIP did not affect the skin bacteria, paving the way to an innovative and 'safer ' future-generation deodorant. In the second part, we developed a fast and efficient procedure based on molecularly imprinted solid phase extraction (MISPE) for the selective clean-up of betanin and its stereoisomer isobetanin from red beetroot extracts. Betanin is a natural pigment with significant antioxidant and biological activities currently used as food colorant. Dipicolinic acid was used as template for the MIP synthesis, because of its structural similarity to the chromophore group of betanin The MISPE procedures were optimized allowing the almost complete removal of carbohydrates and the majority of proteins, resulting in high extraction recovery of betanin / isobetanin in a single step. Moreover, the whole extraction procedure was performed in environmentally friendly solvents with either ethanol or water. To conclude, we believe that this study paves the way towards the development of a new generation of water compatible MIPs with improved recognition properties in highly complex aqueous environments, and should be applicable to other biotechnological and biomedical areas as well
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Walter, Peter Jonathan. "Evaluation of polybenzimidazole as a selective metal sorbent and controlled release agent." Thesis, Virginia Tech, 1986. http://hdl.handle.net/10919/34821.
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Zeiger, Claudia [Verfasser], and H. [Akademischer Betreuer] Hölscher. "Biomimetics for Efficient Oil Water Separation: From Natural Oil Sorbents to Bioinspired Micro- and Nanostructured Polymeric Sorbents and Membranes / Claudia Zeiger ; Betreuer: H. Hölscher." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/116254094X/34.
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Zhao, Boran. "POLYHIPEs MORPHOLOGY, SURFACE MODIFICATION AND TRANSPORT PROPERTIES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1542814326480355.
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Darko, Godfred. "Pre-concentration of heavy metals in aqueous environments using electrospun polymer nanofiber sorbents." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1004998.
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This thesis presents an alternative approach for pre-concentrating heavy metals in aqueous environments using electro spun polymer nanofiber sorbents. The conditions for electrospinning polyethersulfone, polystyrene, polysulfone and polyamide-6 were optimized. The morphologies and porosities of the electrospun nanofibers were studied using SEM and BET nitrogen gas adsorptions. The nanofibers had mesoporous morphologies with specific surface areas up to 58 m2/g. The electro spun nanofiber sorbents were characterized in terms of their tunability for both uptake and release of heavy metals. The usability of the sorbent was also assessed. The sorbents showed fast adsorption kinetics for heavy metals « 20 min for As, Cu, Ni and Pb) in different aqueous environments. The adsorption characteristics of the sorbents best fitted the Freundlich isotherm and followed the first order kinetics. The efficiencies of adsorption and desorption of heavy metals on both imidazolyl-functionalized polystyrene and amino-functionalized polysulfone sorbents were more than 95% up to the fifth cycle of usage. Reusability improved dramatically (up to 10 runs of usage) when mechanically stable amino-functionalized nylon-6 electro spun nanofibers were used. The capacity of the amino-functionalized nylon-6 sorbent to pre-concentrate heavy metals compared very favourably with those of aqua regia and HN03+H202 digestions especially in less complex matrices. Due to their highly porous nature, the electro spun nanofibers exhibited high adsorption capacities (up to 50 mg/g) for heavy metal ions. The loading capacities achieved with the imidazolyl-functionalized sorbent were higher than those for amino-functionalized mesoporous silica and biomass-based sorbents. The electro spun nanofiber sorbents presents an efficient and cost effective alternative for preconcentrating heavy metals in aqueous environments.
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Zhai, Yuxin. "Spectroscopic Evaluation of the CO2 Adsorption Properties on Amine Functionalized Polyvinyl Alcohol and Silica Sorbents." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1397665897.
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Bessho, Naoki. "Advanced pressure swing adsorption system with fiber sorbents for hydrogen recovery." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42822.
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A new concept of a "fiber sorbent" has been investigated. The fiber sorbent is produced as a pseudo-monolithic material comprising polymer (cellulose acetate, CA) and zeolite (NaY) by applying hollow fiber spinning technology. Phase separation of the polymer solution provides an appropriately porous structure throughout the fiber matrix. In addition, the zeolite crystals are homogeneously dispersed in the polymer matrix with high loading. The zeolite is the main contributor to sorption capacity of the fiber sorbent. Mass transfer processes in the fiber sorbent module are analyzed for hydrogen recovery and compared with results for an equivalent size packed bed with identical diameter and length. The model indicates advantageous cases for application of fiber sorbent module over packed bed technology that allows system downsizing and energy saving by changing the outer and bore diameters to maintain or even reduce the pressure drop. The CA-NaY fiber sorbent was spun successfully with highly porous structure and high CO2 sorption capacity. The fiber sorbent enables the shell-side void space for thermal moderation to heat of adsorption, while this cannot be applied to the packed bed. The poly(vinyl alcohol) coated CA-NaY demonstrated the thermal moderation with paraffin wax, which was carefully selected and melt at slightly above operating temperature, in the shell-side in a rapidly cycled pressure swing adsorption. So this new approach is attractive for some hydrogen recovery applications as an alternative to traditional zeolite pellets.
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Pacheco, Rodriguez Diana Marisol. "Aminosilane-functionalized cellulosic polymers for increased carbon dioxide sorption." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42722.
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Improvement of the efficiency of carbon dioxide (CO2) separation from flue gases has been identified as a high-priority research area to reduce the total energy cost of carbon capture and sequestration technologies in coal-fired power plants. Efficient CO2 removal from flue gases by adsorption systems requires the design of novel sorbents capable of capturing, concentrating and recovering CO2 on a cost-effective basis. The preparation of a novel aminosilane-functionalized cellulosic polymer sorbent by grafting of aminosilanes showed promising performance for CO2 separation and capture. A strategy for the introduction of N-(2-aminoethyl)-3-aminoisobutyldimethylmethoxysilane functionalities into cellulose acetate backbone by anhydrous grafting is described in this study. The dry sorption capacity of the aminosilane-functionalized cellulosic polymer reached 27 cc (STP) CO2/ cc sorbent at 1 atm and 39 cc (STP) CO2/ cc sorbent at 5 atm and 308 K. Exposure to water vapor slightly increased the sorption capacity of the sorbent, suggesting its potential for rapid cyclic adsorption processes under humid feed conditions. In addition, a strategy for the preparation of a cellulose acetate-titanium(IV)
oxide sorbent by the reaction of cellulose acetate with titanium tetrachloride is presented.
The organic-metal hybrid sorbent presented a sorption capacity of 14 cc (STP) CO2/ cc sorbent at 1 atm and 49 cc (STP) CO2/ cc sorbent at 5 atm and 308 K. The novel CO2 sorbents were characterized in terms of chemical composition, density changes, molecular structure, thermal stability, and surface morphology.
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Zhao, Qichao. "Ionic Liquid Materials as Gas Chromatography Stationary Phases and Sorbent Coatings in Solid-Phase Microextraction." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1320963975.
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Moein, Mohammad Mahdi. "Towards more selective sorbents for extraction of drugs and biomarkers from biological fluids using molecularly imprinted polymers." Doctoral thesis, Stockholms universitet, Institutionen för analytisk kemi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-103379.
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Sample preparation has a critical role as a first step in analytical processes, especially in bioanalysis and environmental analysis. A good sample preparation technique should be robust and stable, regardless of the sample matrix. The aim of this thesis is to design and synthesize molecularly imprinted polymers that can be used in various sample preparation techniques, such as on-line MEPS, on-line SPE and on-line monolithic pre-columns used for the extraction of drugs, hormones, and cancer biomarkers from human plasma and urine samples. Additional aim was to provide full automation, on-line coupling, short sample preparation time and high-throughput. In this thesis MIP in MEPS was used on-line with liquid chromatography-tandem mass spectrometry (LC/MS/MS) for the determination of sarcosine in human urine and plasma samples. The method was fully automated and the packed sorbent could be used for about hundred extractions. In additional work a coated needle with MIP-Sol-Gel as thin layer was prepared and used for the microextraction of bilirubin from human plasma and urine. Small sample volumes could be handled and the validation of the method showed that the method was robust and selective. In a further work MIP-SPE on-line with HPLC was used for the extraction and determination of dextromethorphan in human plasma samples. MIP-SPE showed a good selectivity and high recovery (87% - 92%). On-line MIP monolithic pre-column was prepared and used in a coupled system for the extraction of tramadol in human plasma and urine samples. The MIP monolithic pre-column showed good selectivity and high extraction recovery was obtained (91-96%). The extraction and analysis of human insulin in plasma and pharmaceutical formulation solutions were carried out using MIP-SPE on-line with HPLC. The validation of the method showed that the method was accurate and robust.At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 5: Submitted.
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Batlokwa, Bareki Shima. "Development of molecularly imprinted polymer based solid phase extraction sorbents for the selective cleanup of food and pharmaceutical residue samples." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1004967.
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This thesis presents the development of chlorophyll, cholic acid, aflatoxin B1 molecularly imprinted polymer (MIP) particles and cholic acid MIP nanofibers for application as selective solid phase extraction (SPE) sorbents. The particles were prepared by bulk polymerization and the nanofibers by a novel approach combining molecular imprinting and electrospinning technology. The AFB1 MIP particles were compared with an aflatoxin specific immunoextraction sorbent in cleaning-up and pre-concentrating aflatoxins from nut extracts. They both recorded high extraction efficiencies (EEs) of > 97 % in selectively extracting the aflatoxins (AFB1, AFB2, AFG1 and AFG2). High reproducibility marked by the low %RSDs of < 1% and low LODs of ≤ 0.02 ng/g were calculated in all cases. The LODs were within the monitoring requirements of the European Commission. The results were validated with a peanut butter certified reference material. The chlorophyll MIP on the other hand selectively removed chlorophyll that would otherwise interfere during pesticide residue analysis (PRA) from > 0.6 to <0.09 Au in green plants extracts. The extracted chlorophyll was removed to far below the level of ≥ 0.399 Au that is usually associated with interference during PRA. Furthermore, the MIP demonstrated better selectivity by removing only chlorophyll (> 99%) in the presence of planar pesticides than the currently employed graphitized carbon black (GCB) that removed both the chlorophyll (> 88%) and planar pesticides (> 89%). For the interfering cholic acid during drug residue analysis, cholic acid MIP electrospun nanofibers demonstrated to be more sensitive and possessing higher loading capacity than the MIP particles. 100% cholic acid was removed by the nanofibers from standard solutions relative to 80% by the particles. This showed that the nanofibers have better performance than the micro particles and as such have potential to replace the particle based SPE sorbents that are currently in use. All the templates were optimally removed from the prepared MIPs by employing a novel pressurized hot water extraction template removal method that was used for the first time in this thesis. The method employed only water, an environmentally friendly solvent to remove templates to ≥ 99.6% with template residual bleeding of ≤ 0.02%.
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Masqué, Granja Núria. "Desenvolupament de sorbents polimèrics per a l'extracció en fase sòlida de contaminants orgànics polars en aigües." Doctoral thesis, Universitat Rovira i Virgili, 2000. http://hdl.handle.net/10803/8986.
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The main objective of this thesis was to synthesise and apply new polymeric sorbents to obtain good recoveries in the solid-phase extraction (SPE) of organic polar pollutants in real water samples. The synthesised sorbents were used in SPE on-line coupled to high-performance liquid chromatography in order to establish analytical methods which can determine these pollutants in tap and river water samples.These synthesised sorbents were several chemically modified polymeric sorbents obtained by introducing different polar functional groups in the chemical structure of a polystyrene-divinylbenzene resin. Thus, the surface of these polymers was more hydrophilic and the polar compounds could be more strongly retained in these sorbents than in the unmodified resin and other commercially available sorbents. Nevertheless, the increase in the capacity of retention of the chemically modified sorbents also implied that more interferences from the matrix were retained, such as humic substances. These substances appear in the chromatograms as an initial broad band which hampers the determination of the more polar analytes. For this reason, a method based on the addition of sodium sulphite to the sample was developed to decrease this matrix interference.
The synthesis of molecularly imprinted polymers was also studied. These polymers were prepared using 4-nitrophenol as the template and the non-covalent method, and allowed 4-nitrophenol to be selectively extracted from real water samples. It was also demonstrated the possibility to use these polymers as sorbents in the SPE on-line coupled to liquid chromatography.
L'objectiu fonamental de la present Tesi Doctoral ha estat el desenvolupament i aplicació de nous sorbents polimèrics per tal d'obtenir bones recuperacions en l'extracció en fase sòlida (SPE) de contaminants orgànics polars presents en mostres d'aigua. Aquests sorbents han estat emprats en la SPE acoblada en línia a la cromatografia de líquids d'alta resolució (HPLC) per tal d'establir mètodes d'anàlisi d'aquests contaminants en aigües de diferent procedència.
Existeixen molts sorbents comercialment disponibles per a realitzar el procés de SPE, però la majoria donen molt baixes recuperacions pels analits més polars i per tant aquests compostos són difícils de determinar a baixos nivells. Una altra important limitació d'aquests sorbents és la seva manca de selectivitat, fet especialment important quan s'analitzen mostres mediambientals d'elevada complexitat.
Per tal d'obtenir unes recuperacions més elevades pels analits polars que amb els sorbents convencionals, en la present tesi s'han desenvolupat nous sorbents polimèrics químicament modificats mitjançant la reacció de Friedel-Crafts. Aquesta reacció ha permès la introducció de diferents grups funcionals polars una la reïna de poliestirè-divinilbenzè (PS-DVB). La seva introducció ha augmentat la polaritat de la superfície de la reïna i d'aquesta manera els analits polars han quedat més retinguts en aquests sorbents químicament modificats que en la reïna de partida. Aquests nous sorbents s'han comparat favorablement amb altres sorbents comercials de diferents tipus en l'extracció de diversos compostos fenòlics i plaguicides polars.
També s'ha avaluat l'efecte de diferents propietats físiques (àrea superficial i diàmetre de partícula i porus) de la reïna de partida sobre el grau de funcionalització en la modificació química del PS-DVB amb el grup o-carboxibenzoil. S'ha obtingut un grau de modificació similar amb tres reïnes i per tant s'ha demostrat que les diferents propietats físiques de les reïnes emprades no tenen efecte sobre el grau de funcionalització amb el grup o-carboxibenzoil. No obstant, s'han obtingut unes recuperacions més grans pels analits més polars amb la reïna que té una àrea superficial més elevada degut a la possibilitat d'un major nombre d'interaccions -.
Degut a l'increment de capacitat de retenció dels polímers químicament modificats apareix l'inconvenient que més interferències de la matriu, com ara les substàncies húmiques, queden retingudes en aquests sorbents. Les substàncies húmiques formen part de la matèria orgànica dissolta en l'aigua i apareixen en els cromatogrames en forma de banda inicial ampla que dificulta la determinació dels analits que elueixen primer, és a dir, els analits més polars. En aquesta tesi s'ha desenvolupat un tractament químic de la mostra amb sulfit sòdic que permet reduir considerablement aquesta banda i per tant facilita la determinació dels compostos més polars sense interferència dels àcids húmics.
En la recerca de sorbents més selectius per a la SPE, l'experimentació d'aquesta tesi s'ha encaminat cap als sorbents polimèrics amb empremta molecular (MIP). Així doncs, s'ha sintetitzat un nou tipus de sorbent selectiu que consisteix en un polímer amb empremta molecular pel 4-nitrofenol.
L'existència d'aquesta empremta molecular pel 4-nitrofenol s'ha demostrat fent un estudi de l'especificitat d'aquest MIP per a l'extracció selectiva del 4-nitrofenol a partir d'una mescla de compostos fenòlics. L'estudi demostra la possibilitat d'emprar un polímer amb empremta molecular com a sorbent en la SPE acoblada en línia a HPLC. Per tal d'obtenir una extracció selectiva del 4-nitrofenol s'han optimitzat alguns paràmetres crítics en el procés de SPE. Aquest sorbent també ha estat avaluat i comparat favorablement amb sorbents comercials en l'extracció de mostres d'aigua del riu Ebre.
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Wilfong, Walter Christopher. "In Situ FTIR and Tubular Reactor Studies for CO2 Capture of Immobilized Amine Sorbents and Liquid Amine Films." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1403704363.
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Najafi, Ali. "Application of Polymeric Ionic Liquid Solid-Phase Microextraction Sorbent Coatings and Ionic Liquid Stationary Phases for Liquid and Multidimensional Gas Chromatographic Techniques." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449846148.
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Bratkowska, Dominika. "Development and application of new polymeric materials for sorptive extraction techniques." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/63173.
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El desenvolupament de diferents materials per a les tècniques d’extracció mitjançant processos de sorció és una àrea en continua expansió; no obstant, l’extracció d’anàlits polars encara és un tema que requereix més investigació. En aquesta Tesi s’han desenvolupa nous materials que reuneixen de selectivitat i/o capacitat característiques per a extreure contaminants orgànics polars en mostres aquoses. La primera part descriu el desenvolupament de nous materials polimèrics que milloren la capacitat i selectivitat de l’extracció en fase solida, i hi inclau els polímers altament entrecreuats amb caràcter hidrofílic, els sorbents altament entrecreuats d’intercanvi iònic de mode-mixte i els líquids iònics suportots en fases polimèriques; així com la seva avaluació com a nous sorbents per a la extracció de contaminats polars en diferents mostres aquoses mediambientals seguit de l’anàlisi per LC. La segona part está centrada en la preparació de noves barres agitadores amb recobriments monolítics polars i la seva posterior aplicació per l’extracció d’analits polars en diferents aigües de procedéncia mediambiental.The development of different materials for sorptive extraction techniques is a continuously evolving field of research. Although there have been significant developments in this area, the extraction of polar analytes is still considered the bottleneck of the extraction process. The efforts have been undertaken to improve capacity and selectivity. For this reason, one of the main objectives of this Thesis is to develop new materials to extract polar organic contaminants from water samples. The first part reports on the development of new polymeric materials for solid-phase extraction including hypercrosslinked polymers with hydrophilic character, mixed-mode ion-exchange hypercrosslinked sorbents and supported ionic liquid polymeric phases and their evaluation as SPE sorbents for the extraction of polar contaminants, followed by LC analysis. The second part is focused on the preparation of new stir bars with polar monolithic coatings and their application to stir bar sorptive extract polar analytes from environmental water samples.
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Zewe, Joseph William. "The Development of Novel Nanomaterials for Separation Science." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345485921.
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Silva, Mojica Ernesto. "Polymer-silica Hybrids for Separation of CO2 and Catalysis of Organic Reactions." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398439043.
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Sartore, Douglas Morisue. "Microextração de canabinoides em urina usando dispositivo empacotado com polímero molecularmente impresso e análise por cromatografia líquida - espectrometria de massas sequencial." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-23102018-171513/.
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O preparo da amostra é uma das etapas mais importantes em toda a análise química. O isolamento e a concentração dos componentes da amostra são cruciais e busca-se sempre que essas etapas sejam as mais simples e consumam o mínimo possível de tempo e reagentes. Nos últimos anos, um tipo de material tem se mostrado bastante útil para análises químicas a partir de fluidos biológicos, os polímeros molecularmente impressos (MIPs). Os MIPs são sintetizados por reações de polimerização, na presença de uma molécula molde (template). A molécula molde se liga aos monômeros funcionais do polímero durante a reação de polimerização e permanece ligada à superfície das cadeias poliméricas quando a reação se completa. Terminada a polimerização, realiza-se a completa lavagem das moléculas molde, assim, restam na superfície polimérica cavidades tridimensionais complementares à molécula empregada como molde. Essas cavidades permitem a ligação reversível e preferencial da molécula molde ou outras com estrutura química semelhante. A Cannabis sativa é a droga ilícita mais consumida em todo o mundo e nos últimos anos muita atenção tem se voltado a seus efeitos toxicológicos no corpo humano e a aplicações medicinais. Nesta dissertação, foi sintetizado um MIP com a molécula molde catequina para a extração e posterior análise por LC-MS/MS dos canabinóides Δ9-tetrahidrocanabinol (THC), 11-hidroxi-Δ9-tetrahidrocannabinol (THC-OH) e 11-nor-Δ9-tetrahidrocannabinol-9-ácido carboxílico (THC-COOH) em amostras de urina. O MIP produzido foi empacotado em microdispositivo e empregado no preparo das amostras de urina por microextração por sorvente empacotado (MEPS). O método desenvolvido apresentou boa linearidade (valores de r de 0,977 para o THC e 0,994 para THC-OH e THC-COOH). Os limites de detecção e de quantificação foram respectivamente de 5 ng mL-1 e 20 ng mL-1, para os compostos THC e THC-OH, na faixa linear de 25 a 250 ng mL-1. Para o composto THC-COOH os limites de detecção e quantificação alcançados foram de 1 ng mL-1 e 5 ng mL-1, respectivamente, na faixa linear de 5 a 170 ng mL-1. O método apresentou valores razoáveis de precisão entre 3,2% (THC-COOH) e 25,1% (THC) e de exatidão, que variou entre -18,4 e 17,4 (ambos para o THC). O MIP empregado no preparo da amostra mostrou-se mais seletivo e específico do que materiais normalmente empregados para a extração dos canabinoides das amostras de urina, além de a técnica de extração por MEPS apresentar baixo consumo de solventes e amostra para a extração dos analitos e posterior análise por LC-MS/MS.The sample preparation is one of the most important steps in every chemical analysis. The isolation and concentration of the sample components are crucial and it is always sought that these steps are simple and consume the lowest amount of time and reagents. In the recent years, a type of material has proved to be very useful for chemical analyzes of biological fluids, the molecularly imprinted polymers (MIPs). MIPs are synthesized by polymerization reactions in the presence of a template molecule. The template molecule binds to the functional monomers of the polymer during the polymerization reaction and remains bonded to the surface of the polymeric chains after the reaction is complete. After the polymerization is finished, the complete washing of the template molecules is carried out, thus, three-dimensional cavities, complementary to the molecule used as a template, remain on the polymer surface. These cavities allow the reversible and preferential bonding of the template molecule or others with similar chemical structure. Cannabis sativa is the most commonly consumed illicit drug in the world and in recent years much attention has focused on its toxicological effects on human body and for medical applications. In this master dissertation, a MIP was synthesized with the catechin molecule as template, for extraction and subsequent analysis by LC-MS/MS of the cannabinoids Δ9-tetrahydrocannabinol (THC), 11-hydroxy-Δ9-tetrahydrocannabinol (THC-OH), and 11-nor-Δ9-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) in urine samples. The MIP produced was packed in a microdevice and used in the preparation of the urine samples by microextraction by packed sorbent (MEPS). The developed method showed good linearity (r values of 0.977 for THC and 0.994 for THC-OH and THC-COOH). The detection and quantification limits were respectively 5 ng mL-1 and 20 ng mL-1 for THC and THC-OH in the linear range from 25 to 250 ng mL-1. For the compound THC-COOH the limits of detection and quantification achieved were 1 ng mL-1 and 5 ng mL-1, respectively, in the linear range from 5 to 170 ng mL-1. The method presented reasonable values of precision, between 3.2% (for THC-COOH) and 25.1% (for THC) and displayed accuracy ranging from -18.4 to 17.4 (both for THC). The MIP used in the sample preparation was more selective and specific than other materials usually employed for the extraction of the cannabinoids from the urine samples. The MEPS technique also showed low consumption of solvents and sample for sample preparation, extraction of analytes and subsequent analysis by LC-MS/MS.
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Kuo, Jinn Yuan, and 郭進原. "Chromatographic Analysis of Phenylpropanolamine Using Synthesized Polymer Sorbents." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/52403256943279411525.
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碩士國立中正大學
化學工程研究所
87
Abstract More than a half of pharmaceutical drugs on the whole market are asymmetric molecules. About 90% of those are administered as racemates. It is not a surprise that the two enantiomers of a racemic drug might interact with the biological system differently. One of the enantiomers may have a pharmacologically different or unwanted side effect. If we separate one from another enantiomer efficiently, we can take less side effects and a less amount of drugs. We used here the latest molecular imprinting technology to prepare a specific affinity sorbent that could be use for the separation of a sympathomimetic chiral drug. In this study, we prepared the molecular imprinting polymers using the method of bulk polymerization. The resultant polymers were crushed and sieved to be the stationary phase, which could separate the mixture consisting of phenylpropanolamine enantiomers and their impurity, aminopropiophenone. In order to search for the best conditions, the polymers were prepared by employing different mole fractions of the crosslinking monomer based on total amount of monomers, reaction temperatures and volume ratios of solvent to all monomers. The mobile phase composition for the chromatography was also studied. From the experimental results, we found that the best conditions for polymer preparation are that the reaction temperature is 4 ℃, the fraction of crosslinking monomer is 80 mol%, and the fraction of solvent is 2.213. The best mobile phase composition is keeping water:acetic acid:acetonitrile at 2.5:5:92.5. We were able to use a 25 cm-long column to separate effectively the enantiomers of phenylpropanolamine and aminopropiophenone. When the 5 μl sample containing 1 mg/ml (±)phenylpropanolamine was applied to the column, a separation with the separation factor of 3.27 and resolution of 3.8 was achieved. The chromatographic efficiency may be improved by using other approachs to prepare spherical molecular imprinting particle with a uniform distribution in size. A large-scale chromatography system based on the results obtained in this work could also be established.
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Meyer, Christoph [Verfasser]. "Polymerbasierte chromatographische Trennmaterialien : Synthese, Charakterisierung und Anwendung = Polymer-based chromatographic sorbents / vorgelegt von Christoph Meyer." 2005. http://d-nb.info/97594956X/34.
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KUO, PING-HUI, and 郭蘋慧. "Development of Polymer Monolith-modified Silica Gel as Solid Phase Extraction Sorbent for Determining of Phenylurea Herbicides in Environmental Waters Using High-performance Liquid Chromatography." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4nc9mw.
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碩士東吳大學
化學系
106
In this study, we synthesized poly(lauryl methacrylate-co-1,6-hexanediol ethoxylate diacrylate) (LMA-HEDA) modified silica gels as solid phase extraction sorbents to extract phenylurea herbicides (PUHs) from environmental water sample prior to LC analysis. A series of characterization experiments (including optical microscopy, scanning electron microscopy and Fourier transform infrared spectroscopy) were carried out to investigate the morphology and chemical structure. Under the optimized conditions, a good linearity (the correlation coefficient (R2) > 0.9997) was achieved in the concentration range of 0.1-4 ng/mL for the target PUHs. The method detection limit (S/N = 3) ranged from 0.027 ng/mL to 0.053 ng/mL. In addition, good intra-day/inter-day precision (0.1-4.55%/0.23-5.86%) and accuracy (96.72-104.16%/95.33-103.59%) of the proposed method were obtained. The results revealed that LMA-HEDA modified silica sorbent has a great potential for determining organic pollutants in environmental applications.
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hsien, chang hsiu, and 張修獻. "Simultaneous determination of 17 sulfonamide residues in milk by using molecularly imprinted polymer and ODS as sorbent of solid-phase extraction on-line to high performance liquid chromatography." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/06640387511405704324.
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碩士國立高雄師範大學
化學系
96
abstract This research is to analyze the concept of Sulfaguanidine、Sulfani lamide、Sulfacetamide、Sulfadiazine、Sulfathiazole、Sulfamerazine、Sulfamethazine、Sulfamethizole、Sulfameter、Sulfamonomethoxine、Sulfachloropyridazine、Sulfadoxine、Sulfamethoxazole、Sulfisoxazole Sulfadimethoxine、Sulfaquino- xaline、Sulfaphenazole，seventeen sulfonamides in the milk by solid-phase extraction column with high performance liguid chromatography. The experiment discussing (1) the optimal chromatographic evaluaion to simultaneous analyze seve- nteen sulfonamides (2) the optimal condition of solid-phase extraction column，including the time of desorption、the slovent intensity of desorption、the test of absorption capcity etc...(3)the pre-treatment of the real sample、the recycling rate of the real sample and the repro- ducibility (RSD value) of the real sample. The experimental result showing the best chromatographic evaluat- ion are :mobile phase A: 0.01M formic acid (pH=2.85),mobile phase B:0.4% formic acid 99.6% ACN,flow rate is 1.0 ml/min,the dectection wave set at 270nm ,Temperature is 28oC , the gradient elution is: 0-2 min: 6% mobile phase B；3-11min: 17.5% mobile phase B:12-33 min :24% mobile phase B. Using the mixing of the sonfonami- des to discussed the best sensitivty of detected methode,can efficientlly sep- arate seventeen sulfonamides ,and also known MIP could rich analy- tes、have selectivity ability.For the linear range is at 0.005~0.1 μg/L，the correlation coefficients are greater than 0.995、and the R.S.D are below 6% and detection limit can get ppb range for the all of sulfonamides. Finally，the optimal experimental options could be used to detect the residual sulfonamide in the milk,and get good recovery and reproducibility , therefore ,getting up a quick and simple methode for Solid-pahse extraction technique.
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施志昂. "Simultaneous determination of malachite green and crystal violet residues in fish muscle by using solid-phase extraction with molecularly imprinted polymer as sorbent on-line to high performance liquid chromatography." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/33684018514026895634.
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