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本文研究了十种变色酸双偶氮胂类试剂与铋—钪的共显色反应,发现其中三溴偶氮胂等五种试剂与铋—钪有共显色反应。铋、钪与试剂生成的配合物的表现摩尔吸光系数为9.4×10~4L·mol~(-1)·cm~(-1)。大量的常见离子不干扰铋的测定,可不经分离直接测定合金中的微量铋。
In this paper, the co-chromogenic reaction of ten chromogenic acid bis-arsenazo reagents with bismuth-scandium was investigated. It was found that five reagents such as tribromoarsenazo co-developed with bismuth-scandium. The molar absorption coefficient of the complexes formed by bismuth, scandium and reagent was 9.4 × 10 -4 L · mol -1 cm -1. A large number of common ions do not interfere with the determination of bismuth can be directly measured without separation of trace bismuth alloy.