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本文研究了Os-SnCl_2-PVA-亮绿离子缔合体系的显色反应,摩尔吸光系数ε_(434)为5.6×10~6L·mol~(-1)·cm~(-1),锇含量在0.1～0.7μg/25mL范围内遵守比耳定律,室温下显色后,吸光度在110min内稳定。研究了30种外来离子的影响,并进行了高纯镍中微量锇的测定。
In this paper, the color reaction of Os-SnCl_2-PVA-Brilliant Green ion-association system was studied. The molar absorptivity ε_ (434) was 5.6 × 10 -6 L · mol -1 cm -1, Beer’s law was obeyed in the range of 0.1 ~ 0.7μg / 25mL, and the absorbance was stable within 110min after color development at room temperature. The influence of 30 foreign ions was investigated and the determination of trace osmium in high purity nickel was carried out.