Electrochemical detection, micellar chromatography

Micellar gradient elution liquid chromatography with electrochemical detection with sodium dodecyl sulfate has been used to separate phenols [186]. [Pg.274]

MM Delgado Zamarreno, A Sanchez Perez, MC Gomez Perez, J Hernandez Mendez. Automatic determination of liposoluble vitamins in butter and margarine using Triton X-100 aqueous micellar solution by liquid chromatography with electrochemical detection. Anal Chim Acta 315 201-208, 1995. [Pg.402]

A. Collier, J. Wang, D. Diamond and E. Dempsey, Microchip micellar electrokinetic chromatography coupled with electrochemical detection for analysis of synthetic oestrogen mimicking compounds, Anal. Chim. Acta, 550 (2005) 107-115. [Pg.869]

Typically, in gradient elution liquid chromatography, electrochemical detection has been difficult due to base-line shifts that result as a consequence of the altered mobile phase composition. However, a unique property of micelles allows for much improved compatibility of gradients (i.e. gradient in terms of micellar concentration or variation of small amount of additive such as pentanol) with electrochemical detectors. This has been demonstrated by the separation and electrochemical detection of phenols using micellar gradient LC (488). A surfactant (apparently non-micellar) gradient elution with electrochemical detection has also been successfully applied for the assay of some thyroid hormones by LC (491). [Pg.60]

HA, heterocyclic amine AA, aromatic amine PA, polyamine Al, aliphatic amine N, nitrosamine CZE, capillary zone electrophoresis MEKC, micellar electrokinetic capillary chromatography LIE, laser induced huorescence ED, electrochemical detection CD, conductivity detection AD, amperometric detection PD, potentiometric detection ALA, alkylamines AQA, alkyl and aUcylbenzyl quaternary ammonium compound A, air H, water S, soil W, waste. [Pg.399]

Khaledi MG, Dorsey JG (1985) Hydro-organic and micellar gradient elution liquid chromatography with electrochemical detection. Anal Chem 57 2190-2196 Kissinger PT (1989) Biomedical applications of liquid chromatography-electrochemistry. J Chromatogr 488 31-52... [Pg.113]

Chen G, Han XH, Zhang LY, Ye JN (2002) Determination of purine and pyrimidine bases in DNA by micellar electrokinetic capillary chromatography with electrochemical detection. J Chnunatogr A 954 267-276... [Pg.773]

Khaled, M. Y., Anderson, M. R., and McNair, H. M. 1993. Micellar electrokinetic capillary chromatography of pungent compounds using simultaneous on-hne ultraviolet and electrochemical detection. J. Chmmatogr. Sci. 31 259-264. [Pg.111]

Wang, Q.J., Yu, H., Ding, F. et al. (2003) Simultaneous determination of food-related biogenic amines and precursor amino acids by micellar electrokinetic capillary chromatography with electrochemical detection. Food Chem., 83,311-317. [Pg.133]

Li, G Fan, C. and Xing, C. (1997) Preliminary study on separation of three vitamins by capillary zone electrophoresis and micellar electrokinetic chromatography with amperometric electrochemical detection. Se Pu, 15, 65-66. [Pg.134]

Hu, Q., Zhou, T.S., Zhang, L. etal. (2001) Separation and determination of three water-soluble vitamins in pharmaceutical preparations and food by micellar electrokinetic chromatography with amperometric electrochemical detection. Anal Chim. Acta, 437, 123-129. [Pg.134]

Micellar electrokinetic capillary chromatography (MEKC) has been used for the determination of DG, BHA, and BHT with photometric detection (280 nm) [74]. Bis-(2-ethylhexyl) sodium sulfosuccinate was used as the pseudostationary phase, reaching a detection limit for DG of 0.27 pg/mL. This compound was determined in edible oils using a previous liquid-liquid extraction with acetonitrile. MEKC has been also applied to the determination of PG, TBHQ, BHA, and BHT mixtures in cosmetic [75] and food [76] samples using sodium dodecyl sulfate and electrochemical detection. [Pg.253]

High-performance liquid chromatography (HPLC) with a micellar mobile phase or with a selective pre-column or reaction detection system has also been used to determine alkylenebis(dithiocarbamaes). ° Zineb and mancozeb residues in feed were determined by ion-pair HPLC with ultraviolet (UV) detection at 272 nm. These compounds were converted to water-soluble sodium salts with ethylenediaminetetra-acetic acid (EDTA) and sodium hydroxide. The extracts were ion-pair methylated with tetrabuthylammonium hydrogensulfate (ion-pair reagent) in a chloroform-hexane solvent mixture at pH 6.5-8.S. The use of an electrochemical detector has also been reported. ... [Pg.1091]

Wang X, Bobbitt DR (2000) Electrochemically generated Ru(bpy)3 -based chemiluminescence detection in micellar electrokinetic chromatography. Talanta 53(2) 337-345... [Pg.99]