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本文研究了在PG20000存在下,铱—氯化亚锡—乙基紫离子缔合显色反应。表现摩尔吸光系数ε_(642nm)=2.3×1O~6L·mol~(-1)·cm~(-1),相关系数为0.9971和0.9994,铱含量在0—1.0和1.0—2.5μg/25mL之间符合比尔定律,在室温下能稳定110分钟。研究了26种外来离子和四种络合剂对本法测定铱的干扰。应用于高纯镍中铱的测定,获得较好的结果。
In this paper, the color reaction of iridium-stannous chloride-ethyl violet ion is studied in the presence of PG20000. The results showed that the molar absorptivity ε_ (642nm) = 2.3 × 10 ~ 6L · mol -1 · cm -1, the correlation coefficients were 0.9971 and 0.9994, the contents of iridium were 0-1.0 and 1.0-2.5μg / 25mL Beer law between the room, stable at 110 minutes. The interference of 26 foreign ions and four complexing agents on the determination of iridium in this method was studied. Used in the determination of high-purity nickel in iridium, get better results.