Revisiting platinum group elements of Late Permian coals from western Guizhou Province, SW China
Revisiting platinum group elements of Late Permian coals from western Guizhou Province, SW China
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DOI：
10.1016/j.coal.2008.05.007
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发表时间：
2008-08
影响因子：
5.6
通讯作者：
L. Qi;Jianfeng Gao
中科院分区：
文献类型：
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作者：
L. Qi;Jianfeng Gao
对贵州威宁、纳雍、织金晚二叠世含煤地层中的25个煤样进行了铂族元素分析。采用Carius管技术对煤灰进行消解，并采用同位素稀释-电感耦合等离子体质谱（ID-ICP-MS）对所有PGEs进行准确测定。结果远低于以前报道的值。我们的研究表明，以前报道的PGE值是不正确的，可能是由于在ICP-MS测量的多原子干扰。威宁煤田煤样中PGE含量最低（0.019 ~ 0.42 ng/g Pd），代表了黔西地区煤中PGE的背景值。部分煤的Pt和Pd含量比背景值高出约20倍，表明铂族元素富集。报道了贵州西部地区煤中PGE的新数据和背景值，并对中国煤中PGE背景值的修正提出了建议。
Twenty five coal samples from the Late Permian coal-bearing strata in Weining, Nayong, and Zhijin, western Guizhou Province, SW, China, were analyzed for platinum group elements (PGEs). The coal ashes were digested by the Carius tube technique and accurately measured by isotope dilution-inductively coupled plasma mass spectrometry (ID-ICP-MS) for all PGEs. The results are much lower than the previous reported values. Our study suggested that the previously reported PGE values are incorrect and may due to the polyatomic interferences in ICP-MS measurements. In our study, samples from the Weining coalfield have the lowest PGE contents (from 0.019 Ir to 0.42 ng/g Pd), which represent the PGE background value in coal in western Guizhou province. Some of the coals have Pt and Pd contents about 20-times higher than the background value, indicating PGEs are concentrated. We also reported new and reliable PGE data and background value of coal in western Guizhou province, SW, China, and suggested to rework the PGE background values of Chinese coals.