Analysis of polymeric quaternary ammonium salts as found in cosmetics by metachromatic polyelectrolyte titration

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Title Analysis of polymeric quaternary ammonium salts as found in cosmetics by metachromatic polyelectrolyte titration
Author Cumming0389772, JanetDNU Louise; Hawker, Darryl William; Matthews, Christopher John; Chapman, Heather Faye; Nugent, K.
Journal Name Toxicological and Environmental Chemistry
Year Published 2010
Place of publication United Kingdom
Publisher Taylor & Francis Ltd.
Abstract Metachromatic polyelectrolyte titration was investigated as a means of analyzing polymeric quaternary ammonium salts (polyquaterniums) of relatively low charge density used as ingredients in cosmetics. They are of possible toxicological concern, but little is known of their environmental fate and behavior. With o-toluidine blue as the indicator, determination of the concentration of a range of polyquaterniums of commercial importance and cosmetic origin was possible. Using a visual endpoint, normalities as low as 3 10-5 N could be determined, while with a spectrophotometric endpoint, the technique was effective to approximately 3 10-6 N. The concentrations (g L-1) to which these normalities correspond depend on the charge density of the polymer. Polyquaterniums are frequently used in association with anionic surfactants in cosmetic formulations and the presence of an anionic surfactant even in excess did not affect results although the color change was less stable. Titration in the presence of prepared humic acid was also possible.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1080/02772248.2010.482062
Volume 92
Issue Number 9
Page from 1595
Page to 1608
ISSN 0277-2248
Date Accessioned 2010-09-14
Date Available 2010-10-14T07:44:57Z
Language en_AU
Research Centre Griffith Centre for Coastal Management
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Chemistry (incl Atmospheric Chemistry)
URI http://hdl.handle.net/10072/34625
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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