Determination of sulfur in metal sulfides by bromine water-CCl4 oxidative dissolution and modified EDTA titration

被引：12

作者：

Darjaa, T ^{[1
]}

Yamada, K ^{[1
]}

Sato, N ^{[1
]}

Fujino, T ^{[1
]}

Waseda, Y ^{[1
]}

机构：

[1] Tohoku Univ, Inst Adv Mat Proc, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1998年 / 361卷 / 05期

关键词：

Standard Deviation; Sulfur; Sulfide; EDTA; Titration;

D O I：

10.1007/s002160050922

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The sulfur content in metal sulfides can be determined after oxidative dissolution with bromine water-CCl4 at 50 degrees C by modified EDTA titration. The sulfides were quantitatively oxidized to SO42- without evolving H2S, and the metal cations were removed by cation exchange on an H-type column. Sulfate was precipitated as BaSO4, and the remaining Ba2+ was subsequently titrated with EDTA at pH = 10. The standard deviation for the determined sulfur in the metal sulfides, some of which can be hardly dissolved in usual mineral acid media, is about a few %. The method can be carried out with sample amounts containing as little as 1.5-2 mg sulfur.

引用

页码：442 / 444

页数：3

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