Investigation of a new reaction for the determination of microquantities of sulfite in some inorganic salts

被引：11

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-001 Kharkov, Ukraine

来源：

ANALYTICA CHIMICA ACTA | 1997年 / 357卷 / 03期

关键词：

redox indicator reaction; copper; manganese; sulfite; trace determination;

D O I：

10.1016/S0003-2670(97)00585-0

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 SO32- 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 isopropyl alcohol the sensitivity of sulfite determination increases up to 0.3 mu g/ml. Random errors lie within the limits allowable at the determination of microconcentrations. To raise the sensitivity of the determination of sulfite in some inorganic salts (KCl, KNO3, CsNO3), this impurity was concentrated by the method of low-temperature directed crystallization. The metrological characteristics of the developed technique are presented. (C) 1997 Elsevier Science B.V.

引用

页码：239 / 245

页数：7

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