Liquid chromatography amperometric detection of nitrite using a polypyrrole modified glassy carbon electrode doped with tungstodiphosphate anion

被引：35

作者：

Liu, ZM ^{[1
]}

Xi, XD ^{[1
]}

Dong, SJ ^{[1
]}

Wang, EK ^{[1
]}

机构：

[1] ACAD SINICA,CHANGCHUN INST APPL CHEM,ELECTROANALYT CHEM LAB,CHANGCHUN 130022,JILIN,PEOPLES R CHINA

来源：

ANALYTICA CHIMICA ACTA | 1997年 / 345卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

liquid chromatography; amperometric detection; P2W18O626-/PPy/GC electrode; electrocatalytic reduction; nitrite;

D O I：

10.1016/S0003-2670(96)00631-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Chromatography-amperometric detection of nitrite with a polypyrrole modified glassy carbon electrode doped with tungstodiphosphate anion (Dawson-type P2W18O626-/PPy/GC electrode) based on its electrocatalytic reduction of nitrite is described. The cyclic and hydrodynamic voltammetry of nitrite at the P2W18O626-/PPy/GC electrode was studied. The factors affecting the detection of nitrite and the analytical performance of the modified electrode in flowing stream were investigated. The results show that the modified electrode has a good sensitivity (the limit of detection is 1 mu mol dm(-3)) and a satisfactory reproducibility (RSD = 3.78%, N = 21). The modified electrode was used in the chromatographic detection of nitrite spiked in the liquid from a tin of mushrooms and the mineralized spring water. It was found that the modified electrode exhibited good selectivity for nitrite.

引用

页码：147 / 153

页数：7

共 21 条

[1] MEASUREMENT OF NITRIC-OXIDE IN BIOLOGICAL MODELS [J].