title: Resonance Rayleigh scattering method for the determination of chitosan with some anionic surfactants.
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 microg/mL for SDBS, 0.27-15.0 microg/mL for SLS and 0.20-15.0 microg/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.
authors.affiliation: School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
authors.forename: Yu-Wei
authors.initials: YW
authors.lastname: Wang
authors.forename: Nian-Bing
authors.initials: NB
authors.lastname: Li
authors.forename: Hong-Qun
authors.initials: HQ
authors.lastname: Luo
mesh_terms: D000838:Anions; D048271:Chitosan / Q000032:analysis*; D013059:Spectrum Analysis, Raman / Q000379:methods* / Q000592:standards; D013501:Surface-Active Agents
chemical_list: D000838:Anions; D013501:Surface-Active Agents; D048271:Chitosan