SPECTRAL PHOTOMETRY OF REACTION OF BARIUM IONS WITH SULFONAZO 3

被引：19

作者：

SLOVAK, Z

FISCHER, J

BORAK, J

机构：

[1] Forschungsinstitut für reine Chemikalien, Lachema, Brno

来源：

TALANTA | 1968年 / 15卷 / 08期

关键词：

D O I：

10.1016/0039-9140(68)80176-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Barium forms a 1:1 complex with Sulphonazo III in the pH range 1.9-2.8, with ε{lunate} = 6.45 × 104 at 642 mμ. In the practical determination of barium by the proposed method, the effective value of ε{lunate} ranges from 1.5-4.0 × 104, depending on pH and total reagent concentration, due to dissociation of the weak complex. Using a new method for the determination of the extinction coefficients of weak complexes, the values for this system, and also the apparent formation constants, have been found, and the composition of the complex verified for the pH range 1.7-3.3. © 1968.

引用

页码：831 / &