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Resonance Rayleigh scattering method for the determination of chitosan with some anionic surfactants

✍ Scribed by Yu-Wei Wang; Nian-Bing Li; Hong-Qun Luo

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
383 KB
Volume
23
Category
Article
ISSN
1522-7235

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✦ Synopsis

Abstract

In weak acidic buffer medium, chitosan binding with an anionic surfactant, such as sodium dodecyl benzene sulphonate (SDBS), sodium lauryl sulphate (SLS) or sodium dodecyl sulphonate (SDS), can result in a significant enhancement of resonance Rayleigh scattering (RRS) intensity. The results showed that under optimum conditions the enhanced RRS intensity is proportional to the concentration of chitosan in the range 0.10–20.0 Β΅g/mL for SDBS, 0.27–15.0 Β΅g/mL for SLS and 0.20–15.0 Β΅g/mL for SDS. Among these, the sensitivity of SDBS is the highest and its detection limit for chitosan is 29 ng/mL, while those of SLS and SDS are 83 and 61 ng/mL, respectively. The method has good selectivity and was applied to the determination of trace amounts of chitosan in practical samples with satisfactory results. Therefore, a simple and convenient method with high sensitivity and selectivity for the determination of chitosan was established. Copyright Β© 2008 John Wiley & Sons, Ltd.

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