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铍及其化合物毒性较强,而且中毒的潜伏期很长,应严格控制铍的污染。铍元素较难于原子化,用空气-乙炔火焰测定灵敏度很低。Runnels曾用石墨炉原子吸收法测定铍,但用普通石墨管精度差。我们也证实了这一点。后用热解石墨管,热解涂层平台技术,加基体改进剂或用最大功率加热方式都得到了满意的结果,但也有不便之处。本文在此基础上探讨了在样品液中加入少量镧,用普通石墨管直接测定铍渣浸出液及水中镀。结果表明,加入镧后,用普通石墨管进行测定,精度大大改善,可用于废渣浸出液及水中铍的分析,方法简便易行。
Beryllium and its compounds are highly toxic, and the incubation period is very long, beryllium pollution should be strictly controlled. Beryllium is harder to atomize and has lower sensitivity with air-acetylene flame. Runnels used graphite furnace atomic absorption spectrometry for the determination of beryllium, but with poor precision graphite tubes. We also confirm this. After using pyrolytic graphite tube, pyrolysis coating platform technology, plus matrix modifier or maximum power heating methods have been satisfactory results, but there are also inconveniences. Based on this, this paper discusses the addition of a small amount of lanthanum in the sample solution, with a common graphite tube direct determination of beryllium slag leaching solution and water plating. The results show that the addition of lanthanum after using ordinary graphite tube determination accuracy greatly improved, can be used for waste residue leaching solution and beryllium analysis, the method is simple and easy.