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Thompson首次介绍铅的氢化物发生—原子吸收分光光度法以来,对进一步提高其灵敏度,改进反应条件及消除干扰等的研究,陆续有文献报告。其中Vijan等提出的硝酸—过氧化氢—硼氢化钠系统及Fleming提出的酒石酸—重铬酸钾—硼氢化钠系统较为成功。但在酸度控制,干扰离子消除等方面尚有不足。本文提出了盐酸—铁氰化钾—硼氢化钠系统发生铅化氢,其灵敏度远较目前文献所报告的为高,同时改进了酸度控制范围,在不加氰化钾的情况下,可消除共存离子干扰。方法筒便易
Thompson first introduced the lead hydride generation - atomic absorption spectrophotometry, to further improve its sensitivity, improve the reaction conditions and eliminate interference, etc., have reported in the literature. The nitric acid-hydrogen peroxide-sodium borohydride system proposed by Vijan et al. And the tartaric acid-potassium dichromate-sodium borohydride system proposed by Fleming are more successful. However, there are still some problems in acidity control and interference ion elimination. In this paper, it is proposed that the hydrogenation of hydrogenation in hydrochloric acid-potassium ferricyanide-sodium borohydride system is much more sensitive than reported in the literature, and the acidity control range is improved at the same time. In the absence of potassium cyanide, Coexistence of ion interference. Method tube easy