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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Direct ICF-MS determination of trace and ultratrace elements in geological materials after decomposition in a microwave oven. Part II. Quantisation of Ba, Cs, Ga, Hf, In, Mo, Nb, Pb, Rb, Sn, Sr, Ta and T1
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Direct ICF-MS determination of trace and ultratrace elements in geological materials after decomposition in a microwave oven. Part II. Quantisation of Ba, Cs, Ga, Hf, In, Mo, Nb, Pb, Rb, Sn, Sr, Ta and T1

机译:ICF-MS在微波炉中分解后直接测定地质材料中的痕量和超痕量元素。第二部分Ba,Cs,Ga,Hf,In,Mo,Nb,Pb,Rb,Sn,Sr,Ta和T1的量化

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摘要

A new method has been developed for the rapid determination of traces of Ba, Cs. Ga, Hf, In, Mo, Nb, Pb, Rb, Sn, Sr, Ta and Tl in silicate rocks and lake, stream and river sediments. The method involved dissolution of samples in a microwave oven by heating in a pressure decomposition Teflon vessel with a mixture of HF + HNO_3 + HC1 + H_3BO_3 + EDTA followed by direct rnukietement determination using inductively coupled plasma-mass spectrometry (TCP/MS). The method is faster than conventional dissolution of samples by open vessel acid digestion and fusion and determination by instrumental methods. The accuracy and precision of the developed method were tested by replicate analyses of a number of international geochemical reference samples of established trace element contents. Satisfactory correlation with the "recommended'' or "consensus" values was found and recoveries were in most cases 95-100%. New values for Ga, In, Nb and Tl in several international geochemieai reference materials are first reported in this paper.
机译:已经开发出一种新方法,用于快速测定痕量的Ba,Cs。硅酸盐岩石,湖泊,河流和河流沉积物中的Ga,Hf,In,Mo,Nb,Pb,Rb,Sn,Sr,Ta和Tl。该方法包括通过在压力分解铁氟龙容器中与HF + HNO_3 + HCl + H_3BO_3 + EDTA的混合物加热来溶解样品,然后使用感应耦合等离子体质谱(TCP / MS)直接定量测定。该方法比传统的通过开放式容器酸消解和融合以及通过仪器方法测定的样品溶解更快。通过对建立的痕量元素含量的许多国际地球化学参考样品进行重复分析,测试了所开发方法的准确性和精密度。发现与“推荐”或“共识”值具有令人满意的相关性,并且大多数情况下回收率为95-100%。本文首先报道了几种国际地球化学参考材料中Ga,In,Nb和Tl的新值。

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