TRACE-METAL ANALYSIS OF WATER CONTAINING HUMIC SUBSTANCES BY X-RAY-FLUORESCENCE

被引：31

作者：

VANDERBORGHT, BM

VANGRIEKEN, RE

机构：

[1] University of Antwerp (U.I.A), Wilrijk

来源：

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 1978年 / 5卷 / 03期

关键词：

activated carbon; humic substances; oxine chelates; trace metals; water; X-ray fluorescence;

D O I：

10.1080/03067317808071147

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Chelation by oxine followed by adsorption on activated carbon results in by the efficient collection of many trace metal ions, independent of the trace metal concentration and of high alkali and alkaline earth ion abundances. Preconcentration factors around 10000 are often achieved. When this preconcentration procedure is combined with energy-dispersive X-ray fluorescence, accurate and precise analysis can be carried out, as was proven in several experiments. The technique can also be applied for the determination of divalent ions in natural waters containing up to 10ppm of humic substances. Trivalent ions can quantitatively be collected from natural water provided suKicient activated carbon is added. Omitting the oxine chelation prior to the activated carbon adsorption step still results in collection of a sometimes important fraction of the trace metal ions from natural waters. This is related to organically bound or colloidal forms of the trace metals. © 1978, Taylor & Francis Group, LLC. All right reserved.

引用

页码：221 / 237

页数：17

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