A new system for the spectrophotometric determination of arsenic in environmental and biological samples

被引：45

作者：

Pillai, A ^{[1
]}

Sunita, G ^{[1
]}

Gupta, VK ^{[1
]}

机构：

[1] Pt Ravishankar Shukla Univ, Sch Studies Chem, Raipur 490010, Madhya Pradesh, India

来源：

ANALYTICA CHIMICA ACTA | 2000年 / 408卷 / 1-2期

关键词：

arsenic(III); rhodamine-B; iodate; environmental; biological samples;

D O I：

10.1016/S0003-2670(99)00832-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new sensitive method is proposed for the determination of traces of arsenic(III). The method involves bleaching of the pinkish red colored dye, Rhodamine-B, by the action of iodine which is released by the reaction between potassium iodate and arsenic in slightly acidic medium. The color of the dye was measured at 553 nm. Beer's law is obeyed in the concentration range of 0.04-0.4 mg l(-1) of arsenic. The molar absorptivity was found to be 3.24 x 10(5) l mol(-1) cm(-1). The proposed method has been successfully applied for the determination of arsenic in various environmental and biological samples. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：111 / 115

页数：5

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