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最近文献介绍,发生的砷化氢以氧化剂碘—碳酸氢钠溶液吸收,与大量杂质分离后砷锑钼蓝显色并用于钢铁等试样的分析。本文将此法应用到测定焊锡中0.1％以下的砷,取得满意的结果。该法具有操作简单,易于掌握,灵敏度比镅蓝法高(ε_(700nm)1.1×10~4)。重现性好,对五个含砷0.001～0.1％代表样的五次分析,其变动系数均在6％以下。此外,发生的锑化氢不干扰测定。
Recent literature, the occurrence of arsine with iodine - sodium bicarbonate solution oxidant absorption, with a large number of impurities isolated arsenic antimony molybdenum blue color and used in steel and other samples analysis. In this paper, this method is applied to the determination of arsenic 0.1% of the following arsenic, and achieved satisfactory results. The method has the advantages of simple operation, easy to grasp and high sensitivity (ε_ (700nm) 1.1 × 10 ~ 4). The reproducibility was good. The five coefficients of five representative samples containing 0.001-0.1% arsenic were all below 6%. In addition, the occurrence of antimony hydride does not interfere with the determination.