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Thematische Bibliographien / Ion-pair chromatography / Dissertationen

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Dissertationen zum Thema „Ion-pair chromatography“

Autor: Grafiati

Veröffentlicht am 29. Juni 2021

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1

Donaldson, M. J. "Solid phase adsorption and ion-pair liquid chromatography of complex mixtures." Thesis, Lancaster University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293135.

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2

Tran, Thi Minh Thu Verfasser], and Peter [Akademischer Betreuer] [Winterhalter. "Studies on betalain phytochemistry by means of ion-pair countercurrent chromatography / Thu Tran Thi Minh ; Betreuer: Peter Winterhalter." Braunschweig : Technische Universität Braunschweig, 2018. http://d-nb.info/1175815403/34.

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3

CUMIN, HADET ANNE. "Chromatographie de paires d'ions des impuretes de l'acide amino-11 undecanoique : essais de retention des colloides de la silice sur une phase stationnaire a groupements catechol." Paris 6, 1987. http://www.theses.fr/1987PA066003.

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Dosage des impuretes contenues dans l'acide amino-11-undecanoique, puis diminution de la teneur en silice des eaux utilisees dans les centrales thermiques ou nucleaires par deux types de procedes differents : copolymerisation en billes poreuses du formol et du pyrocatechol et impregnation de polymeres hydrophobes par un derive du catechol

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4

Jasinski, Rebecka. "Preparative chromatographyfor modified oligonucleotides : Method development for modified oligonucleotides, fromanalytical to preparative chromatography." Thesis, Karlstads universitet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-85021.

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Synthetic oligonucleotides, which are short strings of DNA or RNA, are a grooving area of importance for the pharmaceutical industry and for companies that manufacture diagnostic components. The manufacturing process of synthetic oligonucleotides involves many complex processes that use separation and purification techniques like ion-exchange chromatography, ion-pair reversed phase chromatography and ultra-performance liquid chromatography. In this study, the focus lies on the purification process, where the main aim is to develop a separation and purification method for modified oligonucleoti

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5

Zhang, Wei. "Development of Photochemically Initiated Direct and Indirect Luminescence Detection Methods for Liquid Chromatography (LC) and Study of Aromatic Sulfonates and Phospholipids Using Reversed Phase Ion-Pair LC-Mass Spectrometry." Miami University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1068739487.

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6

Frazer, Lewis. "The impact of various chromatographic conditions on the separation of modified and unmodified oligonucleotides." Thesis, Karlstads universitet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-85275.

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In this study, the effects of certain chromatographic conditions on various modified and unmodified oligonucleotides were investigated. At the forefront of this study was the investigation of a new Ion-pair Reversed-phase liquid chromatography (IP-RPLC) method, that had the potential to replace a previously established triethylammonium acetate (TEAA) IP-RPLC method developed for oligonucleotide separations. This method, utilising the counter ion dibutyl amine (DBA) and a Tris-buffer at pH 8, produced promising results indicating that the strong binding strength of DBA creates a hybrid IEX/RPLC

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7

Alekseeva, A. "COMBINED NMR/LC-MS APPROACH FOR STRUCTURAL CHARACTERIZATION OF HEPARINS AND NON-ANTICOAGULANT GLYCOL-SPLIT HEPARINS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/243373.

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Heparin is a sulfated polysaccharide extracted from animal organs, which is successfully used since more than fifty years in clinics as anticoagulant and antithrombotic drug. There is also a growing interest in investigating and exploiting “new” activities of heparin, especially for cancer therapy. Nowadays, a number of non-anticoagulant glycol-split (gs) heparins, obtained by periodate oxidation/borohydride reduction are being considered as potential anticancer due to a potent inhibitory effect on heparanase, overexpressed by tumors. Additionally, the majority of their biological properties a

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8

Van, Wyk Pieter-Hugo. "Novel methods of chemical speciation of Pt(IV/II) complexes in acid halide-rich solutions by ion-pair RP-HPLC coupled to ICP-OES/MS in conjunction with 195Pt NMR." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80099.

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Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: In this work a robust reversed phase ion-pairing high performance liquid chromatographic (RP-HPLC) method has been developed for the separation, characterization and quantification of all possible [PtCl6-nBrn]2- (n = 0 – 6) and [PtCl4-nBrn]2- (n = 0 – 4) complex anions using UV-Vis detection. High resolution 195Pt NMR of more concentrated PtII/IV solutions served to validate the relevant species assignments, particularly those of the stereoisomer species, cis- and trans- [PtCl4Br2]2-, [PtCl2Br4]2- and mer- and fac-[PtCl3Br3

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9

Delrieu, Pascal. "Utilisation d'acides perfluores en clhp de phase inverse : application a la purification semi-preparative de peptides et d'antibiotiques." Toulouse 3, 1988. http://www.theses.fr/1988TOU30039.

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10

Salameh, Marichal. "A Comparative Analysis of Per- andPolyfluoroalkyl Substances (PFAS) and ExtractableOrganofluorine (EOF) Using Solid PhaseExtraction-Weak Anion Exchange and Ion PairExtraction in SerumMarichal SalamehSpring 2021Independent project." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-93422.

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Per- and polyfluorinated substances (PFAS) are compounds that consist of a carbon chainbackbone that is partially or entirely fluorinated, with an addition of a functional group. SomePFAS are known as persistent organic pollutants (POPs) and have therefore been drawing a lot ofattention as well as increased concerns. PFAS have been detected in humans, wildlife and theenvironment and some have exhibited toxic effects such as hepatotoxicity, immunotoxicity,reproductive toxicity and endocrine disruption as well as being persistent and bioaccumulative.Serum, plasma and whole blood have been used a

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11

El, Hawari Khaled. "Occurrence des résidus et contaminants chimiques dans les miels produits et consommés au Liban : développement et standardisation de méthodes de dépistage adaptées : application aux résidus d'antibiotiques." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1B054/document.

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Une nouvelle méthode, simple et rapide, a été développée pour isoler dans le miel différents antimicrobiens usuellement recherchés en contrôle sanitaire et appartenant à quatre classes différentes: les sulfamides, les tétracyclines, les macrolides et lincosamides associés et les aminoglycosides. Ces molécules antimicrobiennes sont analysées par chromatographie liquide couplée à la spectrométrie de masse en tandem (CL-SM/SM) après avoir été extraites de l’échantillon de miel par une méthode d’extraction unique. Afin de définir les conditions optimales de séparation et de détection, l’influence

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12

Shu, Wei-Chuan, and 許瑋娟. "Determination of Fluorescent Whitening Agents in different matrixs by Ion-Pair High-Performance Liquid Chromatography." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/74048934886298978318.

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碩士<br>國立中央大學<br>化學研究所<br>92<br>Abstract The purpose of this study is to develop a method for the analysis of four stilbene-type disulfonate and one distyrylbiphenyl-type fluorescent whitening agents (FWAs) in different matrixes: laundry detergents, papers and infant clothes, as well as river waters. The sample pretreatment methods involve: the laundry detergent using dissolved, filter and oscillation; the paper and infant cloth samples using a hot-water extraction with SPE; the water sample using the C18 SPE cartridge. The contents of FWAs were then determined by an isocratic ion-pair chromato

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13

Chang, Wen-Fang, and 張文芳. "A Study on the Determination of Copper(II) and Cobalt(II) by Ion-pair Chromatography." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/41411036737196992771.

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碩士<br>靜宜大學<br>應用化學系<br>82<br>Since metals and their complexes play an important role in both biological chemistry and in enviromental chemistry, the analysis of metals is rather important. In recent years, high performance liquid chromatography coupled with various detectors has become one of the best methods for metal analysis. In this study, we used 4-（2-pyridylazo）resorcinol (PAR） as a pre-column reagent, Cu-PAR and Co-PAR were separated and quantitatively determined by reverse phase hi

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14

陳彥志. "Determination of paraquat and diquat in water by ion-pair liquid chromatography on-line microdialysis." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/65519011642432043610.

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碩士<br>國立中興大學<br>化學系<br>91<br>The solid phase extraction is a conventional pre-treatment method for determination of paraquat and diquat in water matrix. However, it need complicated procedure and takes much time in order to concentrate trace compounds. The conventional HPLC methods for analyze those compounds waste a lot of ion pair reagent and suffer a worse separation. In this study, a reversed-phase ion pair liquid chromatography coupling to microdialysis method has been developed to analyze paraquat and diquat in water matrix. Conditions for obtaining optimum dialysis efficienc

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15

Čujová, Sabína. "Využití vysoce účinné iontové chromatografie ve farmaceutické analýze organických aniontů a kationtů." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-285473.

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The thesis is focused on application of ion chromatography in pharmaceutical analyses of organic ions. Ion chromatography is increasingly used in the field of pharmaceutical analysis. This includes the analysis of impurities and metabolites. In the first part of this thesis, ion chromatography is compared with common separation techniques used in pharmacy, such as gas chromatography and high performance liquid chromatography. In the second part development and validation of methods of ion chromatography for purity evaluation and quality control of active pharmaceutical substances Rivastigmine

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16

Liaw, Chiou Shyi, and 廖秋錫. "Study on Determination of Abnormal Metabolic Marks in Body Fluids by Capillary Zone Electrophoresis and Ion Pair Chromatography." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/48750400407821244138.

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碩士<br>靜宜大學<br>應用化學系<br>89<br>Abstract The exceptional organic acid in body fluid was related as closely as physiological metabolism. This study will be established qualitative and quantitative analysis aimed at abnormal metabolic markers-organic acids (orotic acid, hippuric acid, uric acid, fumaric acid, a-ketoglutaric acid, and pyruvic acid) in body fluid. HPLC method with adding ion-pair reagent has a good stability and the consuming material used in long time. The optimum mobile phase for HPLC was 22% methanol and 10mM TBA (pH 4) aqueous in gradient elution. Th

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17

Wang, Chia-Peng, and 王嘉鵬. "Determination of phenoxy acidic herbicides in environmental water sample by microdialysis extraction coupled subcritical water ion-pair chromatography." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/76409552562258780490.

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碩士<br>國立中興大學<br>化學系所<br>97<br>In this study, we have developed a novel green route analytical method for the determination of phenoxy acid herbicides (2,4-D, 2,4,5-T, and MCPP) in water sample using on-line microdialysis extraction coupled with subcritical water ion-pair chromatography. Microdialysis extraction liquid (1-Octanol) and Cellulose Acetate dialysis membrane were employed to extract the analytes from the agricultural water in Yunlin city, Taiwan. The Cellulose Acetate dialysis membrane was directly connected to the injection valve of subcritical water ion-pair chromatography system.

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18

Chia, Kan-Jung, and 賈侃融. "Determination of sulphonated azo dyes in food by ion-pair liquid chromatography with photodiode array and electrospray mass spectrometry detection." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/10018936732593614319.

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碩士<br>東吳大學<br>化學系<br>89<br>Azo dyes are a class of synthetic dyes, which are widely used as coloring agents in a variety of products, such as textiles, paper, leather and foodstuffs. However, some synthetic dyes may be hazardous because of their toxicity. Hence, a sensitive and reliable method of determining dyestuffs is required. A method based on ion-pair liquid chromatography coupled with diode-array detector (DAD) and mass spectrometric (MS) detection has been developed to determine several azo dyes, including acid yellow 23, acid red 27, acid red 18, food yellow 3, food red 17, acid red 2

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19

Yeh, Ming-Kung, and 葉明昆. "Determination of phenoxyacetic acids and chlorophenols in aqueous samples by dynamic liquid-liquid-liquid microextraction with ion-pair liquid chromatography." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/49676269645629622967.

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20

Huang, Hang-Yu, and 黃鴻友. "Determination of nitrophenol、chlorophenol and nathphol in urine samples by three phase solvent bar microextraction coupled with ion pair chromatography." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/92627695511851057896.

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21

Shie, Ying-ying, та 謝瑩瑩. "Enantioseparation of Acids by Partial Filling Technique of Capillary Electrophoretic Chromatography with π-Acid Derived Quinidine as Chiral Ion-Pair Reagent". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/01261368607598987489.

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碩士<br>朝陽科技大學<br>應用化學系碩士班<br>92<br>The potential of 3,5-dinitrobenzoyl quinidine as chiral selector added to a non-aqueous background buffer for the capillary electrophoretic separation of the enantiomers of N-derivatized amino acids and non-steroidal anti-inflammatory drugs are evaluated. Separation is based on chiral analytes of R or S of negatively charged and positively charged quinidine-derived chiral selector to form temporary ion-pair, because of different molecular interactions and mobiling. As a result, the differences in the overall migration of analytes can be achievd. To suppress on

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22

Lin, Yi-Chun, and 林怡君. "Determination of Selenium Compounds in Dietary Supplements and Foods Using Ion-pair Reversed-phase and Anion-exchange Chromatography ICP-MS and ESI-MS." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/03011219158453018479.

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23

Vojta, Jiří. "Využití kapalinové chromatografie ve farmaceutické analýze a příprava monolitických stacionárních fází pro tenkovrstvou chromatografii." Doctoral thesis, 2015. http://www.nusl.cz/ntk/nusl-351678.

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(EN) In the first part of this work, analytical methods for determination of impurities of active pharmaceutical ingredients (API) in combined pharmaceutical dosage forms were developed and validated. Development of the methods covered both the optimization of sample preparation procedure and chromatographic conditions. The methods were validated according to International Conference on Harmonization guideline and both of them were confirmed to be able to analyze stability samples. Impurities in paracetamol, codeine phosphate hemihydrate and pitophenone hydrochloride in the presence of fourth

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24

He, Yan-Hui, and 何妍慧. "Determination of Seven Whitening Agents in Cosmetics by Ion-pair Liquid Chromatographic Method." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/17606553726257882233.

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碩士<br>嘉南藥理科技大學<br>化粧品應用與管理系<br>101<br>The purpose of this study is to separate simultaneously seven water soluble whiten agents by ion pair chromatographic method. These components include ascorbic acid and its three derivative; arbutin, hydroquinone and kojic acid. The parameters of IPC for separation, such as pH value of buffer, organic modifier composition and ion pair reagent concentration, were studied in this research. The results showed these seven compounds could be well separated under optimum condition by using C18 column as stationary phase. The regression coefficient of all compou

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