Mass Fractions of S, Cu, Se, Mo, Ag, Cd, In, Te, Ba, Sm, W, Tl and Bi in Geological Reference Materials and Selected Carbonaceous Chondrites Determined by Isotope Dilution ICP‐MS
Mass Fractions of S, Cu, Se, Mo, Ag, Cd, In, Te, Ba, Sm, W, Tl and Bi in Geological Reference Materials and Selected Carbonaceous Chondrites Determined by Isotope Dilution ICP‐MS
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DOI：
10.1111/j.1751-908x.2014.00312.x
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发表时间：
2015-06
影响因子：
3.8
通讯作者：
Zaicong Wang;H. Becker;F. Wombacher
中科院分区：
文献类型：
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作者：
Zaicong Wang;H. Becker;F. Wombacher
采用高频-硝酸消解-同位素扇形场电感耦合等离子体质谱测定了同一样品等份标准物质中S、铜、硒、钼、银、镉、铟、碲、钡、Sm、W、Tl的质量分数，并与高压弹中的PFA烧杯和高压灰炉中的玻碳容器(HPA-S)进行了比较。此外，铋的测定采用相对于热释光的内标法。由于等压和氧化物干扰对这些元素中的许多元素都造成了问题，因此采用了高效的色谱分离方法，并结合ARIDUS解析器来将干扰影响降至最低。对地质标准物质(BHVO-1、BHVO-2、SCO-1、MAG-1、MRG-1和UB-N)的反复消化和测定，除铋外，大多数元素的相对中精度(1S)为<；5%。用同样的方法对热板消解的NIST SRM 612玻璃样品进行了分析，结果与参考值在2%的相对偏差内基本一致。还报道了碳质球粒陨石Allende、Murchison、Orgueil和依夫纳的数据。在HPA-S中的消化效率与在加压炸弹中一样有效，但在HPA-S处理后，某些元素显示出更高的空白水平。压力弹消解得到挥发性元素S、硒和碲的准确数据，但可能导致W。
Mass fractions of S, Cu, Se, Mo, Ag, Cd, In, Te, Ba, Sm, W and Tl were determined by isotope dilution sector field ICP‐MS in the same sample aliquot of reference materials using HF‐HNO3 digestion in PFA beakers in pressure bombs and glassy carbon vessels in a high‐pressure asher (HPA‐S) for comparison. Additionally, Bi was determined by internal standardisation relative to Tl. Because isobaric and oxide interferences pose problems for many of these elements, efficient chromatographic separation methods in combination with an Aridus desolvator were employed to minimise interference effects. Repeated digestion and measurement of geological reference materials (BHVO‐1, BHVO‐2, SCo‐1, MAG‐1, MRG‐1 and UB‐N) gave results with < 5% relative intermediate precision (1s) for most elements, except Bi. Replicates of NIST SRM 612 glass digested on a hot plate were analysed by the same methods, and the results agree with reference values mostly within 2% relative deviation. Data for the carbonaceous chondrites Allende, Murchison, Orgueil and Ivuna are also reported. Digestion in a HPA‐S was as efficient as in pressure bombs, but some elements displayed higher blank levels following HPA‐S treatment. Pressure bomb digestion yielded precise data for volatile S, Se and Te, but may result in high blanks for W.