1998
DOI: 10.1016/s0021-9673(97)00986-2
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Determination of antibacterial quaternary ammonium compounds in lozenges by capillary electrophoresis

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Cited by 40 publications
(37 citation statements)
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“…Quaternary ammonium salts are positively charged polyatomic ions of symmetrical R4N + Br -structure [10] which has been used numerously in phase transfer catalysis [11][12][13], and as antimicrobial agents in many disinfectants, perfumes and cosmetics [14,15]. Cetyltrimethyl ammonium bromide (CTABr) micellization in aqueous solution occurs as a result of delicate balance between the favourable hydrophobic interaction between the alkyl chains and opposing repulsive interaction between the ionic head group [6,[16][17][18][19].…”
Section: Introductionmentioning
confidence: 99%
“…Quaternary ammonium salts are positively charged polyatomic ions of symmetrical R4N + Br -structure [10] which has been used numerously in phase transfer catalysis [11][12][13], and as antimicrobial agents in many disinfectants, perfumes and cosmetics [14,15]. Cetyltrimethyl ammonium bromide (CTABr) micellization in aqueous solution occurs as a result of delicate balance between the favourable hydrophobic interaction between the alkyl chains and opposing repulsive interaction between the ionic head group [6,[16][17][18][19].…”
Section: Introductionmentioning
confidence: 99%
“…More recently, capillary electrophoresis (CE) has been employed for the analysis of cationic surfactants. [18][19][20] In this paper, we present a flotation-spectrophotometric method for quantitative determination of Cetylpyridinium chloride (CPC), based on its ion associate formation with OR and then the extraction of CPC + -OR -ion-pair into the interface between aqueous and n-hexane phase by flotation method. The method proposed has been successfully applied to the determination of cetylpyridinium chloride in pharmaceutical products.…”
Section: Introductionmentioning
confidence: 99%
“…The usual methods for the determination of cationic surfactants are ion-association titration, 12 extraction spectrometry, 13 high performance liquid chromatography with reversed 14,15 and ion-pair normal phase, 16 and also capillary zone electrophoresis (CZE). [17][18][19][20][21][22][23][24] The application of capillary isotachophoresis for the separation of C8-C20 cationic surfactants has been already reported by Tribet et al 25,26 and Praus. 27 The aim of this work was to study the CSs adsorption on montmorillonite.…”
Section: Introductionmentioning
confidence: 99%