Academic literature on the topic 'Chelation ion chromatography'

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Journal articles on the topic "Chelation ion chromatography"

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Jones, Phil, and Pavel N. Nesterenko. "High-performance chelation ion chromatography." Journal of Chromatography A 789, no. 1-2 (November 1997): 413–35. http://dx.doi.org/10.1016/s0021-9673(97)00824-8.

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Tria, Juliette, Paul R. Haddad, and Pavel N. Nesterenko. "Determination of aluminium using high performance chelation ion chromatography." Journal of Separation Science 31, no. 12 (July 2008): 2231–38. http://dx.doi.org/10.1002/jssc.200800046.

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Li, Yan, Brett Paull, Marius N. Müller, and Pavel N. Nesterenko. "Determination of trace magnesium and strontium in calcium carbonate and calcareous skeletons of marine planktonic organisms using high performance chelation ion chromatography." Analytical Methods 7, no. 2 (2015): 416–22. http://dx.doi.org/10.1039/c4ay02126f.

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Paull, Brett, and Paul R. Haddad. "Chelation ion chromatography of trace metal ions using metallochromic ligands." TrAC Trends in Analytical Chemistry 18, no. 2 (February 1999): 107–14. http://dx.doi.org/10.1016/s0165-9936(98)00104-6.

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Liu, Chuen-Ying, N.-Ming Lee, and Jian-Lian Chen. "γ-Aminobutyrohydroxamate resins as stationary phases of chelation ion chromatography." Analytica Chimica Acta 369, no. 3 (August 1998): 225–33. http://dx.doi.org/10.1016/s0003-2670(98)00253-0.

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Nesterenko, P. N., M. J. Shaw, S. J. Hill, and P. Jones. "Aminophosphonate-Functionalized Silica: A Versatile Chromatographic Stationary Phase for High-Performance Chelation Ion Chromatography." Microchemical Journal 62, no. 1 (May 1999): 58–69. http://dx.doi.org/10.1006/mchj.1999.1717.

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Paull, Brett, and Paul R. Haddad. "Determination of trace uranyl in saline samples using chelation ion chromatography." Analytical Communications 35, no. 1 (1998): 13–16. http://dx.doi.org/10.1039/a707971k.

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Lu, H. "Application of chelation ion chromatography to the determination of lanthanides in agriculture." Talanta 45, no. 1 (December 12, 1997): 119–26. http://dx.doi.org/10.1016/s0039-9140(97)00110-0.

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Murgia, Sandro M., Roberta Selvaggi, and Antonio Poletti. "Determination of trace transition metals in environmental matrices by chelation ion chromatography." Environmental Monitoring and Assessment 174, no. 1-4 (May 6, 2010): 313–26. http://dx.doi.org/10.1007/s10661-010-1459-7.

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Nesterenko, Pavel N., and Phil Jones. "Recent developments in the high-performance chelation ion chromatography of trace metals." Journal of Separation Science 30, no. 11 (July 2007): 1773–93. http://dx.doi.org/10.1002/jssc.200700126.

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Dissertations / Theses on the topic "Chelation ion chromatography"

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Challenger, Owen John. "Investigation of high performance chelation ion chromatography for trace metal determinations." Thesis, University of Plymouth, 1993. http://hdl.handle.net/10026.1/2042.

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Dias, Jailson Cardoso. "Determinação de acetato, nitrato, ferro(II), ferro(III) e cobre em etanol combustivel por cromatografia de ions." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248380.

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Orientador: Lauro Tatsuo Kubota
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica
Made available in DSpace on 2018-08-15T10:20:51Z (GMT). No. of bitstreams: 1 Dias_JailsonCardoso_D.pdf: 1120921 bytes, checksum: 080b276b57f19a203109def137925235 (MD5) Previous issue date: 2010
Resumo: O contexto geral deste trabalho se insere na área de desenvolvimento de métodos analíticos para a separação cromatográfica e detecção de íons em biocombustíveis. Diversos procedimentos de otimização (uni e multivariada) foram executados inicialmente visando estabelecer as melhores condições para uma separação eficiente e seletiva dos diferentes analitos. Posteriormente, os principais parâmetros analíticos foram investigados a fim de avaliar o desempenho e a aplicabilidade de cada método pré-estabelecido. Ao todo, três metodologias foram otimizadas, validadas e aplicadas para a análise de bioetanol, sendo a primeira para a determinação dos íons acetato e nitrato e as demais para a determinação dos íons ferro(II), ferro(III) e cobre (sistemas de eluição a base dos ácidos dipicolínico e quelidâmico). As técnicas de cromatografia líquida por troca iônica com detecção condutimétrica (CLTI-DC) e cromatografia líquida por quelação de íons com detecção fotométrica (CLQI-DF) foram utilizadas para os compostos aniônicos e os íons metálicos, respectivamente. De maneira geral, os resultados obtidos evidenciaram o desempenho analítico satisfatório para os três métodos desenvolvidos. Com exceção do ferro(II), todos os demais analitos apresentaram baixos níveis de detectabilidade, da ordem de mg L. Finalmente, diversas amostras de álcool etílico hidratado combustivel (AEHC) foram analisadas diretamente, sem a necessidade de pré-tratamento, para demonstrar a aplicabilidade de cada método
Abstract: The overall context of this work is in the area of development of analytical methods for the chromatographic separation and detection of ions in biofuels. Several optimization procedures (uni- and multivariate) were performed initially in order to establish the best conditions for an efficient and selective separation of different analytes. Subsequently, the main analytical parameters were investigated to assess the performance and applicability of each method. In all, three methods were optimized, validated and applied to the analysis of fuel ethanol, the first being for the determination of nitrate and acetate and the others for the determination of iron(II), iron(III) and copper (eluents based on dipicolinic and chelidamic acids). The techniques of high performance ion-exchange chromatography with conductivity detection (HPIEC-CD) and high performance chelation ion chromatography with photometric detection (HPCIC-PD) were used for the anionic compounds and metal ions, respectively. Overall, the results showed good analytical performance for the three methods developed. With the exception of the iron(II), all other analytes were detected at mg L levels. Finally, several samples of hydrated fuel ethanol were analyzed with no pretreatment to demonstrate the applicability of each method
Doutorado
Quimica Analitica
Doutor em Ciências
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Stegall, Stacy L. "Separation of Transition and Heavy Metals Using Stationary Phase Gradients and Chelation Thin Layer Chromatography / Evaluation of the Effectiveness of POGIL-PCL Workshops." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4779.

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Gradient surfaces exhibit a variation in functionality along the length of the surface. One method for preparing gradients is controlled-rate infusion (CRI). In Part 1 of this work, CRI was used to prepare gradients for the purpose of separating transition and heavy metals. Initial work on this project was focused on controlling the retention of the metal ions by varying the number of amine groups, aminoalkoxysilane concentration, and the infusion time. The retention factors of four metal ions varied predictably with increasing number of amine groups, increasing aminoalkoxysilane concentration, and increasing infusion time, producing small but useful changes in the retention factors. The continuation of this project involved the preparation of two-dimensional multi-component gradients on TLC plates, which were used to separate six transition and heavy metals. The retention, and thus the separation, was affected by the presence or absence of a gradient and the direction of the gradient. Part 2 of this work focused on understanding the factors that motivated instructors in the early and late stages in the process of change. Instructors who attended the POGIL-PCL (Process-Oriented Guided Inquiry Learning in the Physical Chemistry Laboratory) workshops were asked to complete online surveys. The goals of the first survey were to understand the factors that initially interested instructors in POGIL-PCL, to determine if instructors enter the implementation stage, and to understand the factors that affect how instructors implement POGIL-PCL. Later surveys were designed to explore the development of the POGIL-PCL network and assess whether implementation is sustained over time.
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Paull, Brett. "Investigation of chelating dye impregnated resins for the ion chromatographic determination of trace metals." Thesis, University of Plymouth, 1994. http://hdl.handle.net/10026.1/1702.

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A high-performance chelation ion chromatography (HPCIC) system using chelating dye impregnated resins for the determination of trace metals in various complex matrices is described. The parameters involved in the production of dye impregnated chelating columns have been identified and optimised, A range of chelating dyes have been impregnated successfully into high-performance substrates, producing a number of chelating columns capable of both metal preconcentration and separations. Each of the chelating columns produced exhibited unique chelating properties. These columns have been classified in terms of metal retention characteristics, separation capability and efficiency, dye loading and column capacities. A number of the above dye impregnated chelating columns have been employed successfully for the determination of trace metals in various sample types. This includes the determination of transition and heavy metals in seawater at low ug dm'^ levels, the determination of aluminium in seawater, the determination of alkaline earth metals in oil-well brines and the determination of barium and strontium in calcium containing matrices such as mineral waters and milk powder.
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Li, En Ming, and 李恩銘. "Chelation ion chromatography for the determination of trace elements in complex matrices samples." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/94549133990069018681.

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Li, Guang-Ya, and 李光亞. "Chelation Ion Chromatography - ICPMS Employing Bis(2-aminoethylthio)methylated Resin as Stationary Phase for Trace Noble Metal Analysis." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/14799485995466684709.

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YE, GUO-YING, and 葉國英. "Some investigations of the use of new chelating ion exchange resin in ligand exchange chromatography." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/06739396880218668268.

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Books on the topic "Chelation ion chromatography"

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(Phil), Jones P., and Paull Brett, eds. High performance chelation ion chromatography. Cambridge: Royal Society of Chemistry, 2011.

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High Performance Chelation Ion Chromatography. Cambridge: Royal Society of Chemistry, 2010. http://dx.doi.org/10.1039/9781849732314.

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Book chapters on the topic "Chelation ion chromatography"

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Smith, Michele C., James A. Cook, Thomas C. Furman, Paul D. Gesellchen, Dennis P. Smith, and Hansen Hsiung. "Chelating Peptide-Immobilized Metal-Ion Affinity Chromatography." In ACS Symposium Series, 168–80. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0427.ch012.

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Srijaranai, S., N. Ryan, N. Mitchell, and J. D. Glennon. "Solid Phase Extraction and Chromatography of Metal Ions Using Free and Immobilised Biomimetic Chelating Agents." In Recent Developments in Ion Exchange, 311–15. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0777-5_29.

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Jones, P., and P. N. Nesterenko. "ION EXCHANGE | Chelation Ion Chromatography." In Encyclopedia of Analytical Science, 467–81. Elsevier, 2005. http://dx.doi.org/10.1016/b0-12-369397-7/00288-0.

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Nesterenko, Pavel N., and Phil Jones. "Ion Exchange | Chelation Ion Chromatography." In Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-409547-2.14455-5.

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Conference papers on the topic "Chelation ion chromatography"

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Govers-Riemslag, J. W. P., M. H. J. Knapen, G. Tans, R. F. A. Zwaal, and J. Rosing. "STRUCTURAL AND FUNCTIONAL PROPERTIES OF A PROTHROMBIN ACTIVATOR FROM THE VENOM OF BOTHROPS NEUWIDI." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644321.

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The prothrombin activator from the venom of Bothrops neuwidi has been purified to homogeniety by gelfiltration on Sephadex G-100, ion-exchange chromatography on DEAE-Sephacel and metal-chelate affinity chromatography on an Epoxy-activated Sepharose 6B column loaded with ZnCl . The overall purification was about 200-fold, which indicates that the crude venom contains about 0.5 weight % of the prothrombin activator. The venom activator is a single chain protein with an apparent molecular weight of 60,000 dalton. It readily activated bovine prothrombin with a Km of 37.7 uM and a Vmax of 120 umoles prothrombin activated per min/mg of purified venom activator. Venom-catalyzed prothrombin activation was not accelerated by the accessory components of the prothrombinase complex i.e. phospholipids plus calcium-ions and Factor Va. The venom activator does not require added calcium-ions for the expression of its prothrombin-converting activity. Calcium ions do, however, affect the catalytic activity of the venom activator. At 2 mM CaCl there is a 2-fold increase of the rate of venom-catalyzed prothrombin activation. However, at higher CaCl concentrations there is a gradual decrease of the activity of the venom activator. Gelelectro-phoretic analysis of prothrombin activation indicated that the venom activator only cleaved the Arg 323-Ile 324 bond of bovine prothrombin since meizothrombin was the only product of prothrombin activation. The activator did not hydrolyze the chromogenic substrates S2222, S2337, S2238, S2366, S2302 or chromozym TH and its prothrombin converting activity was not inhibited by benza-midine, phenylmethylsulfonylfluoride, dansyl-glu-gly-arg-chloro-methylketone and soybean trypsin inhibitor. However, chelating agents such as EDTA, EGTA and o-phenanthroline strongly inhibited the enzymatic activity of the venom activator. The activity of chelator-treated venom activator could, however, be restored by the addition of an excess CaCl . These results indicate that the enzyme from Bothrops neuwidi does not belong to the serine proteases but has the properties of a metal proteinase. Thus, the activator differs remarkably from Factor Xa, but strongly resembles the prothrombin activator from the venom of Echis carinatus, both structurally and functionally.
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Caebron, J. Y., M. Joseph, H. Vorng, J. Pincemail, M. Lagaede, and A. Capron. "OXYGEN FREE RADICAL-DEPENDENT STEP IN THE CYTOTOXICITY OF DEC-TREATED PLATELETS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1642819.

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Over the past 35 years, diethylcarbamazine (DEC) has been the most widely used agent for the treatment of filarial diseases. However, in spite of millions of individuals treated, the mode of action of this drug remained unexplained until recently when we reported that the microfilaricidal activity of DEC was mediated by blood platelets with the additional triggering of a filarial excretory antigen (FEA) (Nature, 1987).To set up the mechanism of the larvicidal action of platelets activatedby both DEC and FEA, various inhibitors of the arachidonic acid metabolism were added in the cytotoxic assay. Aspirin failed to modify the platelet activity, whilst nordihydroguaiaretic acid, esculetin, and 5,8,11,14-heneicosatetraynoic acid dose-dependently inhibited the killing of parasites. This relationship suggested the production of a putative cytotoxic lipoxygenase product. Surprisingly, no increase in oxygenated metabolites was noted both by thin layer chromatography and by high pressure liquid chromatography.Thus, we investigated the involvement of oxygen free radicals. The hydroxyl radical scavengers tested (benzoate, uric acid, mannitol, methylene blue... ) more or less inhibited the platelet killing activity. In addition, Fe2 + (down to 10-11M) enhanced the DEC-induced cytotoxicity which was abolished in the presence of the Fe2 + chelator o-phenantroline. Finally, using the electronspin resonance technique it was possible to drop OH radicals from platelets with DMPO, but only in the presence of both DEC and FEA.These results, taken with those concerning the interaction of either IgE/anti-IgE (Nature, 1983, 303, 810-812) or CRP (Science, 1986, 231, 153-156) with platelets, should be regarded as a significant insight into the involvement of platelets in various pathological processes.
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