Effect of HF addition on the microwave-assisted acid-digestion for the determination of metals in coal by inductively coupled plasma-atomic emission spectrometry.
Effect of HF addition on the microwave-assisted acid-digestion for the determination of metals in coal by inductively coupled plasma-atomic emission spectrometry.
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DOI：
10.1016/j.talanta.2004.09.018
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发表时间：
2005-03
期刊：
影响因子：
6.1
通讯作者：
Yan-hua Xu;A. Iwashita;T. Nakajima;H. Yamashita;H. Takanashi;A. Ohki
中科院分区：
文献类型：
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作者：
Yan-hua Xu;A. Iwashita;T. Nakajima;H. Yamashita;H. Takanashi;A. Ohki
研究了微波消解-电感耦合等离子体原子发射光谱法测定煤中金属元素的方法，重点讨论了加入HF的必要性。通过对BCR-180、BCR-040、NIST-1632 b、NIST-1632 c和SARM-20等5种标准物质的测定，发现无HF（HNO 3 + H2 O2）两段消解法对ICP-AES测量的前处理非常有效。煤中的主要金属（Al，Ca，Fe和Mg）和次要或痕量金属（Co，Cr，Cu，Mn，Ni，Pb和Zn）的回收率均达到了标准值或参考值。通过使用一组从未接触过HF的血管，消除了“HF记忆效应”的可能性。用本方法分析了24种日本标准煤（SS煤），用本方法测量的主要金属浓度与真正的JIS（日本工业标准）方法的浓度非常一致。
The microwave-assisted acid-digestion for the determination of metals in coal by ICP-AES was investigated, especially focusing on the necessity of adding HF. By testing five certified reference materials, BCR-180, BCR-040, NIST-1632b, NIST-1632c, and SARM-20, it was found that the two-stage digestion without HF (HNO3+H2O2was used) was very effective for the pretreatment of ICP-AES measurement. Both major metals (Al, Ca, Fe, and Mg) and minor or trace metals (Co, Cr, Cu, Mn, Ni, Pb, and Zn) in coal gave good recoveries for their certified or reference values. The possibility of ‘HF-memory effect’ was cancelled by the use of a set of vessels which had been never contacted with HF. Twenty-four Japanese standard coals (SS coals) were analyzed by the present method, and the concentrations of major metals measured by the present method provided very high accordance with those from the authentic JIS (Japanese Industrial Standard) method.