title: Linear sweep voltammetric studies on the complex of alizarin red s with aloe polysaccharide and determination of aloe polysaccharide.
abstract: A new electrochemical method for the determination of aloe polysaccharide based on its interaction with alizarin red s was established on a pretreated glassy carbon electrode in pH 3.5 Britton-Robinson buffer solution by linear sweep voltammetry in this work. The decrease of the second order derivative linear sweep voltammetric reductive peak current of alizarin red s is in proportion to aloe polysaccharide concentration due to the formation of a complex between them in the range from 0.032 to 0.448μmolL(-1), and the detection limit is 0.0051μmolL(-1) (3σ). The binding ratio and the binding constant of the complex were calculated as 1:1 and 2.75×10(4), respectively. Different kinds of complex samples of aloe polysaccharide were detected satisfactorily by this method.
authors.affiliation: School of Chemical & Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China. wenxiugu@gmail.com
authors.forename: Wenxiu
authors.initials: W
authors.lastname: Gu
authors.forename: Yuru
authors.initials: Y
authors.lastname: Wang
authors.forename: Tingting
authors.initials: T
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Haijun
authors.initials: H
authors.lastname: Wang
authors.forename: Wenshui
authors.initials: W
authors.lastname: Xia
mesh_terms: D000504:Aloe / Q000737:chemistry*; D000880:Anthraquinones / Q000737:chemistry*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D008969:Molecular Sequence Data; D011134:Polysaccharides / Q000032:analysis*
chemical_list: D000880:Anthraquinones; D011134:Polysaccharides; C004468:Alizarin Red S