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化学学报
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化学学报 ›› 1981, Vol. 39 ›› Issue (6): 575-578. 上一篇    下一篇

研究简报

基体改进效应石墨炉原子吸收测定易挥发性元素砷、硒、碲、银、锑和铋

单孝全, 倪哲明   

  1. 中国科学院环境化学研究所 北京
  • 投稿日期:1979-11-29 发布日期:2013-06-03

MATRIX MODIFICATION FOR THE DETERMINATION OF VOLATILE ELEMENTS OF ARSENIC, SELENIUM, TELLURIUM, SILVER, ANTIMONY AND BISMUTH BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

SHAN XIAO-QUAN, NI ZHE-MING   

  1. Institute of Environmental Chemistry, Academia Sinica, Beijing
  • Received:1979-11-29 Published:2013-06-03

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651

被引次数

13

石墨炉原子吸收测定易挥发性痕量元素时,往往在原子化以前的灰化阶段即挥发损失以致分析结果偏低.同时又由于允许的灰化温度较低,样品中的基体不能驱尽,因此在原子化阶段产生严重的背景吸收.为消除这类干扰,文献报道采用基体改进技术,即在待测样品溶液中或在石墨炉中加入某种化学试剂,将待测元素转变为较稳定的化合物,从而有利于提高灰化温度,防止灰化损失和消除基体干扰.我们已应用微克量钯作为基体改进剂测定废水中痕量汞和海水中铅.

Micrograms of platinum,palladium and iridium were employed for stabilizing trace arsenic,selenium,tellurium,silver,antimony and bismuth.Tolerated charring temperatures for those elements can bo raised up to the range of 1000 to 1500℃ with significant improvement of sensitivities.Mechanism of stabilization effect was poytulaced to be the formation of stable compounds or alloy.