Capillary electrophoretic separation of polynuclear aromatic hydrocarbons using sodium cholate in mixed aqueous–organic buffers

Ren, Hongji; Li, Xing‐Fang; Qi, Ming; Stathakis, Costas; Dovic̀hi, Norman J.

doi:10.1016/s0021-9673(98)00366-5

Cited by 13 publications

(2 citation statements)

References 19 publications

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“…Typically they are used in separations with analytes that have some aromatic character or are roughly planar in nature [4]. Bile salt micelles are more stable than SDS micelles in the presence of organic modifiers [3,4,7,[11][12][13][14][15]. Bile salt micelles are more stable than SDS micelles in the presence of organic modifiers [3,4,7,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Micellar electrokinetic chromatography of tri aza aromatic ligand compounds of iron (II): Influence of bile salt type on enantiomeric separation

et al. 2001

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Micellar electrokinetic chromatography is used with a variety of bile salt micelles to separate the enantiomers of bis(8-((pyridine-2-methylene)amino)quinoline)iron(II) hexafluorophosphate, Fe(PMAQ)2(PF6)2; bis(8-((pyridine-2-methylene)amino)lepidine iron(II) hexafluorophosphate, Fe(PMAL)2(PF6)2; and bis(1-(2-pyridinyl)ethylidine)-8-aminoquinoline iron(II) hexafluorophosphate, Fe(PEAQ)2(PF6)2. The influence of ten different bile salts on the resolution of each pair of enantiomers is investigated. Significant changes in resolution are seen depending upon the bile salt used. The dihydroxy bile salts are superior to the trihydroxy bile salts in terms of resolution, and the taurine or glycine conjugated bile salts yield better results than the unconjugated bile salts. Resolution for most enantiomers is maximized in a buffer solution containing 10-15% acetone and employing either taurochenodeoxycholic or glycochenodeoxycholic acid as the bile salt. Evidence for the separation of the corresponding Fe(III) complexes is presented.

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Section: Introductionmentioning

confidence: 99%

Micellar electrokinetic chromatography of tri aza aromatic ligand compounds of iron (II): Influence of bile salt type on enantiomeric separation

et al. 2001

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“…Nonylphenol and its derivates are compounds which are poorly solubilized in water, especially NP which has a solubility of 2 mg/L. The use of bile salts with hydrophobic moieties could make the separation faster and more efficient [39].…”

Section: Selection Of Bge Solutionmentioning

confidence: 99%

Determination of nonylphenol and nonylphenol ethoxylates in wastewater using MEKC

Núñez

Wiedmer²,

Parshintsev

et al. 2009

J of Separation Science

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Nonylphenol ethoxylates (NPEO(x)) are surfactants which are used worldwide and can be transformed in the environment by microorganisms to form nonylphenol (NP). Analysis of these compounds was carried out with micellar electrokinetic capillary chromatography (MEKC). Different parameters such as background electrolyte (BGE) solution, pH, type of surfactant, and sample stacking were optimized. The use of CHES (20 mM, pH 9.1) in combination with 50 mM sodium cholate as a surfactant as BGE solution, together with sample stacking using 50 mM NaCl in the sample and an injection time of 20 s, provided the best separation of the compounds studied. The method was applied to the determination of target analytes in two types of sludge water coming from two steps of a wastewater treatment plant. Liquid-liquid extraction was carried out using toluene as solvent, resulting in recoveries around 100% for all studied analytes. The presence of NPEO(x) was observed in the first step of the sludge water treatment, based on migration time and UV spectra. Identification was confirmed using tandem MS. LOQs of the studied compounds were in the range of 12.7 to 30.8 ng/mL, which is satisfactory for the analysis of real wastewater samples.

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Capillary electrophoresis and capillary electrochromatography of organic pollutants

1999

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Capillary electrophoretic separation of polynuclear aromatic hydrocarbons using sodium cholate in mixed aqueous–organic buffers

Cited by 13 publications

References 19 publications

Micellar electrokinetic chromatography of tri aza aromatic ligand compounds of iron (II): Influence of bile salt type on enantiomeric separation

Micellar electrokinetic chromatography of tri aza aromatic ligand compounds of iron (II): Influence of bile salt type on enantiomeric separation

Determination of nonylphenol and nonylphenol ethoxylates in wastewater using MEKC

Capillary electrophoresis and capillary electrochromatography of organic pollutants

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