Food Chemistry 239 (2018) 126–131 Contents lists available at ScienceDirect Food Chemistry journal homepage: www.elsevier.com/locate/foodchem Analytical Methods Resonance Rayleigh scattering method for the determination of chitosan using erythrosine B as a probe and PVA as sensitization a a a,b,⇑ a,⇑ Caijuan Ma , Weiai Zhang , Zhengquan Su , Yan Bai School of Public Health, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province 510310, China Key Research Center of Liver Regulation for Hyperlipidemia SATCM/Class III Laboratory of Metabolism SATCM, Guangdong TCM Key Laboratory for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou 510006, China ar ti c l e i nf o ab stra ct Article history: A highly sensitive resonance Rayleigh scattering (RRS) method for the determination of chitosan (CTS) Received 8 June 2016 was developed. In the pH 3.8 Britton-Robinson buffer solution, CTS interacted with erythrosine B (Ery Received in revised form 17 April 2017 B) to form an ion-association complex of [Ery B-CTS] which increased the RRS intensity of the system. Accepted 2 June 2017 With the addition of polyvinyl alcohol (PVA), the RRS intensity was signiﬁcantly enhanced, and the Available online 10 June 2017 RRS intensity of the reagent blank(I ) dramatically decreased. The enhanced RRS intensity (DI) was
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