Tetrazolium violet - a new spectrophotometric reagent molybdenum determination

被引：0

作者：

Kamburova, M. ^{[1
]}

Kostova, D. ^{[1
]}

机构：

[1] Univ Agr, Plovdiv 4000, Bulgaria

来源：

CHEMIJA | 2008年 / 19卷 / 02期

关键词：

molybdenum determination; extraction-spectrophotometry; tetrazolium violet; soils;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The interaction of Mo(VI) and tetrazolium violet (TV) has been examined. The ion-associate formed is extracted into 1,2-dichloroethane. The tetrazolium violet: molybdenum(VI):3,4,5-tri-hydroxybenzoic acid ratio (R) is 2: 1:2. The optimum conditions have been established. Beer's law is obeyed in the range of 0.2-5 mu g ml(-1) molybdenum(VI). The molar absorptivity of the complex is (1.30 +/- 0.08) x 10(5)L mol(-1) cm(-1). The sensitivity of the method is 7.4 x 10(-4) mu g cm(-2). It is possible to extract and determine molybdenum in the presence of a large number of cations and anions. The characteristic values for the extraction and the aqueous phase equilibria were determined. A sensitive and selective method for determination of molybdenum(VI) micro-quantities in soils has been developed.

引用

页码：13 / 18

页数：6

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