Determination of forty two major and trace elements in USGS and NIST SRM glasses by laser ablation-inductively coupled plasma-mass spectrometry
Determination of forty two major and trace elements in USGS and NIST SRM glasses by laser ablation-inductively coupled plasma-mass spectrometry
复制标题
DOI：
10.1111/j.1751-908x.2002.tb00886.x
复制
发表时间：
2002-01-01
期刊：
影响因子：
--
通讯作者：
Hu, SH
中科院分区：
文献类型：
--
作者：
Gao, S;Liu, XM;Hu, SH
采用激光烧蚀-电感耦合等离子体质谱法测定了美国地质调查局玄武岩玻璃标准物质BCR-2G、BHVO-2G和BIR-1G中42种主要元素（Na、Mg、Ti和Mn）和微量元素（包括Li和U）。使用NIST SRM 610结合使用Ca的内标化进行校准。还对作为未知样品的NIST SR 612和614以及NIST SR 610进行了测定，其中包括45种主要（Al和Na）和微量元素。测定的相对标准偏差（RSD）小于10%的大多数元素在所有的玻璃在调查。一致的例外是BCR-2G、BHVO-2G和BIR-1G中的Sri和Sb。对于BCR-2G、BHVO-2G和BIR-1G，对于低于1500 μ g（-1）的元素，RSD与浓度之间存在对数尺度上的明显负相关，对数相关系数在-0.75和-0.86之间。从NIST SRM 610到SRM 612再到SRM 614，随着浓度的降低，RSD也有明显的增加趋势。这些表明，表观元素浓度的分散性的差异不是由于化学异质性，但反映了分析的不确定性。可以得出结论，所有，这些玻璃是，总体上，均匀的规模为60 mum.Our第一次的结果对BHVO-2G和BIR-1G表明，他们一般同意与BHVO-2/BHVO-1和BIR-1在10%的相对。BHVO-2G中的杂质为Nb、To和Pb，比BHVO-2和BHVO-1的参考值低14-45%。BIR-1G中的Be、Ni、Zn、Y、Zr、Nb、Sr、Sb、Gd、Tb、Er、Pb和U也是例外。然而，在这些元素中，Be、Nb、Sn、Sb、Gd、Tb、Pb和U给出的结果在我们的数据和BIR-1参考值之间的2s不确定度内是一致的。NIST SRM 612的结果与已发表的数据一致，但Mg和Sn除外。在NIST SRM 614的情况下，对于m/z大于或等于85的元素（Rb），这也是正确的。BCR-2G、BHVO-2G和BIR-1G中的No和Mg的测量值与参考值之间的良好一致性，以及NIST SRM 610中的A和Na的测量值与参考值之间的良好一致性，612和614，浓度高达至少几个重量百分比（由于108的动态范围，可以进行分析）表明该技术适用于主要、次要和痕量元素的测定。
Forty two major (Na, Mg, Ti and Mn) and trace elements covering the mass range from Li to U in three USGS basalt glass reference materials BCR-2G, BHVO-2G and BIR-1G were determined using laser ablation-inductively coupled plasma-mass spectrometry. Calibration was performed using NIST SRM 610 in conjunction with internal standardisation using Ca. Determinations were also made on NIST SRM 612 and 614 as well as NIST SRM 610 as unknown samples, and included forty five major (Al and Na) and trace elements. Relative standard deviation (RSD) of determinations was below 10% for most elements in all the glasses under investigation. Consistent exceptions were Sri and Sb in BCR-2G, BHVO-2G and BIR-1G. For BCR-2G, BHVO-2G and BIR-1G, clear negative correlations on a logarithmic scale exist between RSD and concentration for elements lower than 1500 mug g(-1) with logarithmic correlation coefficients between -0.75 and -0.86. There is also a clear trend of increasing RSD with decreasing concentration from NIST SRM 610 through SRM 612 to SRM 614. These suggest that the difference in the scatter of apparent element concentrations is not due to chemical heterogeneity but reflects analytical uncertainty. It is concluded that all, these glasses are, overall, homogeneous on a scale of 60 mum.Our first results on BHVO-2G and BIR-1G showed that they generally agreed with BHVO-2/BHVO-1 and BIR-1 within 10% relative. Exceptions were Nb, To and Pb in BHVO-2G, which were 14-45% lower than reference values for BHVO-2 and BHVO-1. Be, Ni, Zn, Y, Zr, Nb, Sri, Sb, Gd, Tb, Er, Pb and U in BIR-1G were also exceptions. However, of these elements, Be, Nb, Sn, Sb, Gd, Tb, Pb and U gave results that were consistent within an uncertainty of 2s between our data and BIR-1 reference values. Results on NIST SRM 612 agreed well with published data, except for Mg and Sn. This was also true for elements with m/z greater than or equal to 85 (Rb) in the case of NIST SRM 614.The good agreement between measured and reference values for No and Mg in BCR-2G, BHVO-2G and BIR-1 G, and for A and Na in NIST SRM 610, 612 and 614 up to concentrations of at least several weight percent (which were possible to analyse due to the dynamic range of 108) indicates the suitability of this technique for major, minor and trace element determinations.