氢化物—石墨炉原子吸收光谱法测定岩石土壤及水样中的微量锡

Determination of Trace Amount of Tin in Rocks, Soils and Water Samples by Hydride-Graphite Furnace Atomic Absorption Spectrometry

本文针对地质样品中的微量锡,汇集了氢化物、石墨炉二种方法的优点,对仪器及操作作了改进,将发生的气相氢化物通过干燥,用液氮冷凝使之富集,最后导入石墨炉原子化,从而使原子吸收分光光度法测定锡的灵敏度有很大的提高[1]。

This paper deals with the determination of trace amount of tin in geological materials. The advantages of both hydride method and graphite furnace method were combined. The generated gaseous hydride was dried, cooled with liquid nitrogen and finally introduced into the interior of the graphite tube and atomized. The detection limit of the method was 0.035 ppm and the sensitivity was 0.024 ng/ml/1%,