Use of a large quartz spectrograph for the determination of thorium, yttrium and the rare earths in silicates

IF 6.1 1区化学 Q1 CHEMISTRY, ANALYTICAL Talanta Pub Date : 1968-12-01 Epub Date: 2001-11-30 DOI:10.1016/0039-9140(68)80205-X

N.E. Cohen, R.D. Reeves, R.R. Brooks

引用次数: 3

Abstract

Studies were carried out on the optimum conditions for the successful use of a large quartz spectrograph for the determination of thorium, yttrium and the rare earths in silicate rocks. The best line-to-background ratios were achieved by arcing samples in a matrix of 4 % sodium chloride in carbon powder. An atmosphere of 20 % argon and 80% oxygen was used to reduce background and eliminate cyanogen band interference. An anion-exchange procedure was used to separate the rare earths from other elements. The resultant enrichment allowed use to be made of less sensitive rare earth lines in the ultraviolet end of the spectrum where the spectrographic dispersion is greater. Line interferences were studied and necessary corrections for these interferences were calculated. The technique was tested by analysing the standard rocks, G-1, W-1 and CAAS syenite. Good agreement with recommended values was obtained.

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用大型石英光谱仪测定硅酸盐中的钍、钇和稀土

对大型石英光谱仪成功测定硅酸盐岩石中钍、钇和稀土的最佳条件进行了研究。在4%氯化钠的碳粉基体中进行弧处理，获得了最佳的线本比。采用20%氩气和80%氧气的气氛降低了本底，消除了氰带干扰。用阴离子交换法把稀土从其他元素中分离出来。由此产生的富集允许在光谱色散较大的紫外端使用不太敏感的稀土谱线。对线干涉进行了研究，并对这些干涉进行了必要的修正。通过分析标准岩、G-1、W-1和CAAS正长岩，对该技术进行了验证。结果与推荐值吻合良好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.