A new differential pulse voltammetric method for the determination of nitrate at a copper plated glassy carbon electrode

被引：29

作者：

Solak, AO ^{[1
]}

Gülser, P ^{[1
]}

Gökmese, E ^{[1
]}

Gökmese, F ^{[1
]}

机构：

[1] Ankara Univ, Fac Sci, Dept Chem, TR-06100 Ankara, Turkey

来源：

MIKROCHIMICA ACTA | 2000年 / 134卷 / 1-2期

关键词：

nitrate determination; differential pulse voltammetry; glassy carbon electrode;

D O I：

10.1007/s006040070057

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A differential pulse voltammetric method for the determination of nitrate has been described, which is applicable to the analysis of natural water samples with nitrate levels greater than 2.8 x 10(-6) M. A reduction peak for the nitrate ions at a freshly copper plated glassy carbon electrode was observed at about -0.50 V vs Ag \AgCl\ KClsatd electrode in a solution of 2.0 x 10(-2) M Cu2+. 0.5 M H2SO4 and 1.0 x 10(-3) M KCl and exploited for analytical purposes. The working linear range was established by regression analysis and found to extend from 2.8 x 10(-6) M to 8.0 x 10(-5) M. The proposed method was applied for the determination of nitrate in natural waters. The detection limit of the method was 2.8 x 10(-6) M and the sensitivity was 0.9683 A . L/mol. The possible interferences by some ions such as phosphate, nitrite and some halides were determined and found to lead to shifts of the peak position and increasing the peak heights.

引用

页码：77 / 82

页数：6

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