Interference of thiosulfate during colorimetric analysis of hexavalent chromium using 1,5-diphenylcarbazide method

被引：11

作者：

Bardiya, N ^{[1
]}

Hwang, YW ^{[1
]}

Bae, JH ^{[1
]}

机构：

[1] Inha Univ, Dept Environm Engn, Inchon 402751, South Korea

来源：

ANAEROBE | 2004年 / 10卷 / 01期

关键词：

chromate measurement; 1,5-diphenylcarbazide; thiosulfate; interference;

D O I：

10.1016/j.anaerobe.2003.10.001

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Thiosulfate (S2O32-) contained in the media for autotrophic Cr (VI) reduction was found to interfere with Cr (VI) measurement following the 1,5-diphenylcarbazide (DPC) method. The interference was confirmed at several abiotic and biotic conditions, and was influenced by S2O32- concentration, pH, and the media components. At neutral to alkaline pH, 500 mg/L of S2O32- did not cause interference, while 4 mg/L of S2O32- resulted in the interference at pH 2.0. Atomic absorption spectrophotometry could be an alternative method when the interference by S2O32- is expected. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：7 / 11

页数：5

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