分光光度法測定微量鈧——三元顯色體系Sc(Ⅲ)-CPA-pc-Ⅰ<sup>-</sup>的研究

分光光度法測定微量鈧——三元顯色體系Sc(Ⅲ)-CPA-pc-Ⅰ^-的研究

摘要: 系統地研究了Sc(Ⅲ)-CPA-pc-I^-三元配合物顯色體系的最佳顯色條件及其主要性質,測定了共存離子的影響。鈧含量在每25ml含0~7.5μg范圍內服從比爾定律。表觀摩爾吸光系數為1.4×10⁵l·cm^-1·mol^-1.采用該三元體系測定了合成試樣及攀枝花鐵礦中的微量鈧,結果與推薦值基本相符。

Abstract: The optimum chromogenic conditions of the colored system that is ternary coordination compound Sc(Ⅲ)-CPA-pc-Ⅰ^- and its main characters were studied systemati-cally. The influence of some foreign ions on this colored system was measured. Beer's law is obeyed over a range of 0~7.5 μg Sc/25ml. The relative molar absorpbility is 1.4×10⁵ 1·mol^-1·cm^-1. The system was used to determine the trace amount of scan-dium in a synthetic sample and in Pan Zhihua magnetite, the results were satisfied.