SINGLE SWEEP POLAROGRAPHIC-DETERMINATION OF TRACE NITRITE IN FERROUS AND ASCORBIC-ACID MEDIUM

被引：6

作者：

MO, JW ^{[1
]}

JIN, DA ^{[1
]}

PEI, JH ^{[1
]}

ZHAO, ZF ^{[1
]}

机构：

[1] WUHAN UNIV,DEPT CHEM,WUHAN,PEOPLES R CHINA

来源：

ANALYTICAL SCIENCES | 1990年 / 6卷 / 02期

关键词：

ascorbic acid; iron(II) complex; Nitrite; polarographic determination;

D O I：

10.2116/analsci.6.251

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The (FeNO)2+ complex can be formed in a solution that contains ferrous ion (ammonium ferrous sulfate), nitrite (sodium nitrite) and ascorbic acid. With a dropping mercury electrode, this complex has a catalytic wave at -0.58 V which can be used for the determination of trace nitrite in the range of 1×10-7 to 4×10-4 M with the detection limit of 5×10-8 M. The function of ascorbic acid is to reduce NO2- to NO quantitatively for complete formation of the electroactive complex. The mechanism of the electrode process has been studied by linear sweep polarography, direct current polarography, cyclic voltammetry and spectrophotometry. © 1990, The Japan Society for Analytical Chemistry. All rights reserved.

引用

页码：251 / 255

页数：5

共 14 条

[1]

BAUMANN F, 1963, J ELECTROANAL CHEM, V6, P245

[2] DIFFERENTIAL PULSE POLAROGRAPHIC-DETERMINATION OF NITRATE AND NITRITE [J].