Sensor film for Vitamin C determination based on absorption properties of polyaniline

被引：44

作者：

Andreu, Y ^{[1
]}

de Marcos, S ^{[1
]}

Castillo, JR ^{[1
]}

Galbán, J ^{[1
]}

机构：

[1] Univ Zaragoza, Fac Sci, Analyt Chem Dept, Analyt Spectroscopy & Sensors Grp, Zaragoza 50009, Spain

来源：

TALANTA | 2005年 / 65卷 / 04期

关键词：

optical sensor film; vitamin C; polyaniline; redox;

D O I：

10.1016/j.talanta.2004.08.036

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An analytical method based on the absorption changes of chemically polymerised polyaniline at 700 rum is proposed for the determination of Vitamin C. Vitamin C produces a polyanifine film reduction, originating changes in its absorbance proportional to the Vitamin C concentration. The optimum reaction conditions and the analytical characteristics have been studied. The linear response of the method ranged from 0.10 to 1.0 mg l(-1) for a 6 min reaction time and from 1.0 to 8.0 mg l(-1) for a 2 min reaction time. Reproducibility, expressed as the coefficient of variation, was 0.8% (6 min reaction time) and 2.3% (2 min reaction time) (n = 10). The method has been applied to Vitamin C determination in pharmaceutical preparations and commercial fruit juices. The results were compared with those obtained by the 2,6-dichlorophenolindophenol titration method (the AOAC Official Method) and no systematic errors were observed. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1045 / 1051

页数：7

共 25 条

[1] Optical ozone detection by use of polyaniline film [J].