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Titolo:
Separation of benzenediamines, benzenediols and aminophenols in oxidative hair dyes by micellar electrokinetic chromatography using cationic surfactants
Autore:
Lin, CE; Chen, YT; Wang, TZ;
Indirizzi:
Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan Natl Taiwan Univ Taipei Taiwan 106 n Univ, Dept Chem, Taipei 106, Taiwan
Titolo Testata:
JOURNAL OF CHROMATOGRAPHY A
fascicolo: 1-2, volume: 837, anno: 1999,
pagine: 241 - 252
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; MIGRATION BEHAVIOR; ELECTROPHORESIS; CAPILLARIES; COLORANTS; ISOMERS; WATER; HPLC;
Keywords:
cosmetics; buffer composition; dyes; benzenediamines; benzenediols; aminophenols; phenols;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Lin, CE Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan Natl Taiwan Univ Taipei Taiwan 106 Dept Chem, Taipei 106, Taiwan
Citazione:
C.E. Lin et al., "Separation of benzenediamines, benzenediols and aminophenols in oxidative hair dyes by micellar electrokinetic chromatography using cationic surfactants", J CHROMAT A, 837(1-2), 1999, pp. 241-252

Abstract

The separation of 13 dye intermediates, including benzenediamine, benzenediols and aminophenols, in oxidative hair dyes was investigated by micellar electrokinetic chromatography (MEKC) using tetradecyl- and hexadecyl-trimethylammonium bromides (TTAB and CTAB) as cationic surfactants in a phosphatebuffer at acidic pH. The influences of separation parameters such as micelle concentration, buffer pH, buffer concentration and organic modifiers on the selectivity and migration order of these dye intermediates were examined. The results indicate that micelle concentration and buffer pH are the two most important factors that affect greatly the migration and the separation of these dye intermediates. The electrophoretic mobility of 6-methyl-3-aminophenol, 1,3-benzenediol and 1,2,benzenediol, owing to solute-micelle interactions, increases markedly with increasing micelle concentration, but decreases to a greater extent than that of the other analytes with increasing the proportion of organic modifiers. Thus the selectivity and the order of migration of the analytes which migrate consecutively with these three analytes may be altered on varying these separation parameters. Complete separation was achieved either with TTAB at a concentration of 18 mM or with CTAB at a concentration of 13 mM at pH 5.0. The analysis of a real sample of a commercial product of oxidative hair dyes was performed. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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Documento generato il 23/09/20 alle ore 10:56:16