DETERMINATION OF CADMIUM AND LEAD IN FOODS BY GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY WITH ZEEMAN BACKGROUND CORRECTION - TEST WITH CERTIFIED REFERENCE MATERIALS

被引：19

作者：

ELLEN, G

VANLOON, JW

机构：

[1] National Institute of Public Health and Environmental Protection, BA Bilthoven, 3720

[2] Netherlands Institute for Dairy Research (NIZO), 6710 BA Ede

来源：

FOOD ADDITIVES AND CONTAMINANTS | 1990年 / 7卷 / 02期

关键词：

Cadmium; Lead; Reference materials; Zeeman-AAS;

D O I：

10.1080/02652039009373891

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two methods for the determination of cadmium and lead based on graphite furnace atomic absorption spectrometry (GFAAS) with Zeeman background correction are described. The main difference between the methods is the method of sample destruction, bomb digestion versus dry ashing. The precision and accuracy of the methods has been tested by analyzing 16 different reference materials, with cadmium concentrations varying from 2.9 μg/kg to 2.7 mg/kg and lead concentrations from 44 μg/kg to 13.5 mg/kg. The methods produced results which differ, with a few exceptions, less than 10% from the certified contents, with relative standard deviations of around 5%. The methods are not difficult to carry out, are not very laborious and without modifications are applicable to a large variety of products. The sample solutions obtained can also be used for the determination of other elements, e.g. Al, Cr, Cu, Hg, Mn, Ni and Zn. The detection limits, for test portions of 1 and 5 g (wet products) are 0.5-1 μg/kg for cadmium and 5-20 μg/kg for lead. © 1990 Taylor & Francis Ltd.

引用

页码：265 / 273

页数：9

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