Determination of microquantities of thiosulfate by kinetic method

被引：4
|
作者：
Pulyayeva, IV [1 ]
Yegorova, NL [1 ]
Experiandova, LP [1 ]
Blank, AB [1 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Single Crystals, UA-310001 Kharkov, Ukraine
来源：
TALANTA | 1998年 / 47卷 / 01期
关键词：
D O I：
10.1016/S0039-9140(98)00077-0
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new redox indicator reaction between Cu2+, Mn2+ and S2O32- in the presence of 2,2'-bicinchoninic acid is investigated. Optimum reaction conditions are determined. The influence of nonaqueous solvents on the reaction rate is studied. It is shown that in the presence of acetone the S2O32- determination limit is lowered 0.005 mu g ml(-1). Random errors lie within the limits allowable at the determination of microconcentrations. To raise the sensitivity of the determination of S2O32- in some inorganic salts (KCl, KNO3, CsNO3), this impurity was concentrated by low-temperature directed crystallisation. Metrologic characteristics of the developed technique are presented. (C) 1998 Elsevier Science B.V. All rights reserved.
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页码：213 / 221
页数：9
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