Electrothermal atomic absorption spectrometric determination of total and hexavalent chromium in atmospheric aerosols

被引：17

作者：

Mandiwana, Khakhathi L. ^{[1
]}

Panichev, Nikolay

Resane, Tabby

机构：

[1] Tshwane Univ Technol, Dept Chem, ZA-0200 Rosslyn, South Africa

[2] Univ Witwatersrand, Sch Geosci, Johannesburg, South Africa

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2006年 / 136卷 / 02期

关键词：

electrothermal atomic absorption; hexavalent chromium; atmospheric aerosols;

D O I：

10.1016/j.jhazmat.2005.12.030

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A method was developed which allow separate determination of Cr(VI) and total Cr from the same minute sample of atmospheric aerosols. Cr(VI) was leached was with 0.1 M Na2CO3 and the total Cr concentrations were determined after acid digestion. The method was validated by the analysis of certified reference materials, CRM 545, Mess-3 and Pacs-2 with good agreement between certified and found values. Cr concentrations in air samples taken around the chromium smelter show concentrations that exceed the maximum allowed levels in 8 h with higher values closer to the smelter. The limit of detection (LOD) of the method for Cr(VI) determination in air samples was found to be 0.2 ng m(-1), i.e. lower than offered by the commonly preferred spectrophotometric and colorimetric techniques. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：379 / 382

页数：4

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