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铋在地壳中的平均含量为1.7×10~(-7)g(基性岩中含1×10~(-9)g)。地球化学找矿,环境保护监测等试样经常要求测定痕量铋。以火焰原子吸收法测定时,由于铋的最佳分析线处于近紫外区(小于230nm),使测定碰到困难。我们采用原子吸收分光光度计附件MHS-20汞/氢发生装置,以电热氢化物-原子吸收法对矿石和水系沉积物中痕量铋的测定进行了研究,拟定了简易、准确的测定方法,本方法亦适用于环境保护监测等试样中痕量铋的测定。
The average content of bismuth in the crust is 1.7 × 10 ~ (-7) g (1 × 10 ~ (-9) g in basic rocks). Geochemical prospecting, environmental monitoring and other samples often require the determination of trace bismuth. When measured by flame atomic absorption spectrometry, the determination was difficult because the best analytical line for bismuth was in the near ultraviolet region (less than 230 nm). We use the atomic absorption spectrophotometer annex MHS-20 mercury / hydrogen generator, with electrothermal hydrides - atomic absorption method for the determination of trace amounts of bismuth in ore and sediments, developed a simple and accurate method for determination, This method is also applicable to the determination of trace amounts of bismuth in environmental protection monitoring samples.