Optimised method of coal digestion for trace metal determination by atomic absorption spectroscopy

被引：25

作者：

Ikävalko, E

Laitinen, T

Revitzer, H

机构：

[1] VTT Chem Technol, FIN-02044 Espoo, Finland

[2] VTT Mfg Technol, FIN-02044 Espoo, Finland

[3] Helsinki Univ Technol, Ctr Chem Anal, FIN-02015 Espoo, Finland

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1999年 / 363卷 / 03期

关键词：

D O I：

10.1007/s002160051195

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Understanding the transport of trace elements through a coal-fired power plant requires reliable analytical methods for these elements in all the ingoing and outgoing mass streams. Coal and different kinds of ashes comprise the most abundant mass streams in such a plant. As a continuation of our previous work, we have optimised a digestion method for the AAS determination of heavy metals in coal samples. It has become evident that complete dissolution of metals in coal samples and accurate results in subsequent analysis can be obtained by means of applying pressurised digestion under microwave heating. The combination of HNO3 (conc.) and HF (conc.) in the volume ratio of 50:1 attacked the sample well enough, and good recoveries for all the metals studied were obtained. Surprisingly good results were obtained also when HNO3 alone was used as the digestion acid.

引用

页码：314 / 316

页数：3

共 9 条

[1] COMPARISON OF CONVENTIONAL AND MICROWAVE WET ACID DIGESTION PROCEDURES FOR THE DETERMINATION OF IRON, NICKEL AND VANADIUM IN COAL BY ELECTROTHERMAL ATOMIZATION ATOMIC-ABSORPTION SPECTROMETRY [J].