Development of a novel nitrite amperometric sensor based on poly(toluidine blue) film electrode

被引：29

作者：

Yang, Chunhai

Xu, Junhui

Hu, Shengshui ^{[1
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

[2] Hubei Inst Nationalities, Dept Chem, Enshi 445000, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2007年 / 11卷 / 04期

关键词：

toluidine blue; nitrite; electropolymerization; amperometry; sensor;

D O I：

10.1007/s10008-006-0188-x

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A novel sensor for the determination of nitrite anion (NO2-) was fabricated by electrodeposition of toluidine blue. The sensor exhibited good catalytic activity toward the electrochemical oxidation of nitrite. Amperometry was carried out to determine the concentration of NO2-. A linear response in the range from 1.0x10(-7) to 1.52x10(-5) M with a substantially low detection limit of 5x10(-8) M (S/N=3) was obtained. The proposed sensor had a feature of high sensitivity of 4.7x10(5) mu A M-1 cm(-2). The possible interference from several common ions was tested. This sensor was applied to the amperometric determination of nitrite in food samples, and the results were consistent with those obtained with the standard spectrophotometric procedure.

引用

页码：514 / 520

页数：7

共 32 条

[1] Design and characterization of chemically modified electrodes with iron(III) porphyrinic-based polymers: Study of their reactivity toward nitrites and nitric oxide in aqueous solution [J].