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本文研究了在氨性溶液中用喹哪碇红发色,甲基异丁酮和醋酸异戊酯混合溶剂萃取后比色测定银。络合物的最大吸收峰在525毫微米。克分子吸收系数为37.800。0—15微克银/10毫升服从比尔定律。络合物中银与喹哪啶红的组成比为1:4。微量铂、金和卤族元素不干扰测定;在有EDTA和柠檬酸铵等掩蔽剂存在下,一般常见元素也均不干扰测定。应用于铅锌矿中银的测定,操作简便,准确度和重现性均较好。
In this paper, the colorimetric determination of silver after extraction with a mixture of quinacridone, methyl isobutyl ketone and isoamyl acetate in ammoniacal solution was studied. The maximum absorption peak of the complex is at 525 nm. Molecular absorption coefficient of 37.800.0-15 micrograms silver / 10 ml subject to Bill’s law. Complex composition of silver and quinaldine composition ratio of 1: 4. Trace platinum, gold and halogen elements do not interfere with the determination; in the presence of EDTA and ammonium citrate and other masking agents, the common elements do not interfere with the determination. Used in the determination of lead-zinc mine silver, easy to operate, accuracy and reproducibility are better.