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本文解决了用空气—乙炔焰原子吸收测定岩石中微量锶的困难。采用硫酸铅共沉淀—连续离心分离法,微量锶可从大量复杂的基体中分离富集。吸附的微量干扰元素,采用 CHOK盐消除。本法具有简便、快速、准确的优点。适用大量铝、钛、硅存在下的岩石中微量锶的测定。对含锶0.005%以上的样品,测定的相对标准偏差小于6%。
This paper solves the difficulty of determination of trace strontium in rock by air-acetylene flame atomic absorption spectrometry. Using lead sulfate co-precipitation - continuous centrifugation, trace strontium can be separated from a large number of complex matrix enrichment. Adsorbed trace interference elements, the use of CHOK salt elimination. This law has the advantages of simplicity, speed, accuracy. Determination of trace amounts of strontium in rocks in the presence of a large amount of aluminum, titanium and silicon. For samples containing more than 0.005% strontium, the relative standard deviation was less than 6%.