CATALYTIC KINETIC DETERMINATION OF ULTRATRACE AMOUNTS OF NITRITE WITH DETECTION BY DIFFERENTIAL-PULSE POLAROGRAPHIC METHOD

被引：10

作者：

ENSAFI, AA

KOLAGAR, MS

机构：

[1] College of Chemistry, Isfahan University of Technology, Isfahan

来源：

ANALYTICAL LETTERS | 1995年 / 28卷 / 07期

关键词：

CATALYTIC; DIFFERENTIAL PULSE POLAROGRAPHY; NITRITE;

D O I：

10.1080/00032719508000342

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nitrite ion can be determined with a high degree of accuracy and sensitivity by differential pulse polarography, based on the catalytic effect of nitrite on the oxidation of Nile blue A in the presence of sodium bromate at acidic media and 25 degrees C. The reaction rate was monitored by measuring the differential pulse polarography peak current of the Nile blue A. Nitrite concentration of 2 - 2000 ng.ml(-1) can be determined by the fixed time method of 3 min from initiation of the reaction. The limit of detection was 0.4 ng.ml(-1). The effects of more than forty ions on nitrite determination were studied. The method was used to determine nitrite concentration in processed river and spring water.

引用

页码：1245 / 1260

页数：16

共 14 条

[1] DETERMINATION OF NITRITE ION USING DIFFERENTIAL PULSE POLAROGRAPHY [J].