Determination of trace elements on small geological samples fused in lithium tetraborate with x-ray fluorescence spectrometry
Determination of trace elements on small geological samples fused in lithium tetraborate with x-ray fluorescence spectrometry
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X射线荧光光谱法测定四硼酸锂熔融小地质样品中的微量元素
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
C. Palme
中科院分区：
文献类型：
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作者：
E. Jagoutz;C. Palme
本文讨论了用X射线光谱法测定小地质样品（100 mg）中微量元素Rb、Sr、Y、Zr和Nb的方法，并给出了测定结果。对于先前的主要元素分析，样品已在Li/sub 2/B/sub 4/O/sub 7/（900 mg）和NaNO/sub 3/（200 mg）中熔融以形成厚度约为1 mm的玻璃盘。这些相对较薄的样品需要对能量高于Fe K的X射线强度进行厚度校正。阿尔法船长使用合成标准品进行校准。通过与国际标准进行比较，估计浓度在20至100 ppM之间的准确度约为10%，浓度超过100 ppM的准确度约为5%。三张图，六张表。
The determination of the trace elements Rb, Sr, Y, Zr, and Nb on small geological samples (100 mg) by x-ray spectrometry is discussed and results are shown. For previous major element analyses, the samples have been fused in Li/sub 2/B/sub 4/O/sub 7/ (900 mg) and NaNO/sub 3/ (200 mg) to form a glass disk with a thickness of approximately 1 mm. These relatively thin samples require a thickness correction for the x-ray intensities for energies higher than Fe K..cap alpha... Synthetic standards were used for calibration. Accuracy, estimated by comparison with international standards, is about 10% for concentrations between 20 and 100 ppM and 5% for concentrations of more than 100 ppM. 3 figures, 6 tables.