直流等离子体原子发射光谱法线性校正测定天然水中锶的研究

Researches for the Determination of Strontium in Natural Water by Direct Current Plasma Atomic Emission Spectrometry Linear Correction Method

本文提出了采用直流等离子体原子发射光谱法测定天然水中微量锶的灵敏新方法。提出了一种简便的线性校正方法校正共存元素Ｃａ的干扰。精确测定了Ｃａ对Ｓｒ４２１．５ｎｍ干扰的线性校正系数为（５．７２±０．２１）×１０＾－４。方法检测下限达成０．００２ｍｇ／Ｌ。测定了模拟水样和天然水样，并做了回收率试验。结果表明：锶测定准确度得到改善，回收率在９４￣１０６％。

The new sensitive method for the determination of trace strontium in natural water withdirect current plasma atomic emission spectrometry in developed in this paper. A simpler linear correc tion method for the interference of coexistent element Ca is given- The linear c0rrection coefficient ofCh interfereing Sr 421. 5 nm,i. e- (5. 72± 0. 21 ) × 10-4,is precisely measured- The lower determina tion Iimit of the method is 0.002mg/L. The simulative and natural water sample are determined andthe recovery test is engaged in. The results are shown that the accuracy of determination of Sr is im proved,and the recovery is between 94~ 106 %