Detection and spectrophotometric determination of EDTA with cobalt(II) and phosphomolybdic acid in urine and detergents

被引：11

作者：

Parkash, R ^{[1
]}

Bansal, R ^{[1
]}

Rehani, SK ^{[1
]}

Dixit, S ^{[1
]}

机构：

[1] Punjab Univ, Dept Chem, Chandigarh 160014, India

来源：

TALANTA | 1998年 / 46卷 / 06期

关键词：

spectrophotometry; EDTA; Co(II); phosphomolybdic acid;

D O I：

10.1016/S0039-9140(98)00041-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple, rapid, sensitive and selective method for the microgram detection and spectrophotometric determination of EDTA in water, human urine and detergents, based on its reaction with Co(II) and phosphomolybdic acid at pH 0.5-2.0 is reported. Absorbance is measured against Co(II)-phosphomolybdic acid reference solution at 750 nm. The effect of time, temperature, pH and Co(II) or phosphomolybdic acid concentration is studied, and optimum operating conditions are established. Beer's law is applicable in the concentration range 0.3-1.9 mu g ml(-1) of 10(-5)M EDTA. Its detection limit is 0.14 mu g in the solution phase and 0.03 mu g in the resin phase. The relative standard deviation is +/-0.13 mu g. Ag(I), Zn(II), Cu(II), Ni(II), Pb(II), Cd(II), Ca(II), Mg(II), Fe(III), Cr(III), U(VI), chloride, nitrite, phosphate. oxalate, berate and amino acids do not interfere. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：1573 / 1576

页数：4

共 9 条

[1] SPECTROPHOTOMETRIC DETERMINATION OF EDTA [J].