论文部分内容阅读
用氢化物—原子吸收法测定地质样品中痕量的铋已有报导。但是,对于组成比较复杂的地质样品来说,铋的测定仍然会遇到一些干扰。在过去的报告中,作者曾经对氢化物中的干扰详细地进行了讨论,并且提出在采用缝式石英管作为原子化器时,氢化物法中的气相干扰要比常规的T形石英管中所遇到的气相干扰少得多。本文采用缝式石英管作为原子化器以减少形成氢化物元素间的气相干扰,同时又对铜、镍、钴等元素对铋的干扰进行了进一步的研究。提出了一个适用于组成变化较大的地质样品中痕量铋的测定方法,测定下限可低至O.Xppm。
Determination of trace amounts of bismuth in geological samples by hydride generation-atomic absorption has been reported. However, the determination of bismuth still encounters some disturbances for the more complex geological samples. In the past reports, the authors have discussed in detail the interference in hydride and proposed that when using slotted quartz tube as the atomizer, the gas phase interference in hydride method is lower than that in conventional T-shaped quartz tube The gas phase encountered is much less disturbing. In this paper, a slotted quartz tube was used as the atomizer to reduce the gas phase interferences between the hydride elements, and the interference of bismuth with copper, nickel, cobalt and other elements was further studied. A method for the determination of trace bismuth in geological samples with large composition changes is proposed. The lower limit of determination can be as low as O.Xppm.