论文部分内容阅读
首次报道了硫酸介质中微量钌（Ⅲ）对ＫＩＯ４（或ＫＢｒＯ３）氧化２－［（３，５－二溴－２－吡啶）－偶氮－５－二乙氨基苯酚（３，５－Ｂｒ２－ＰＡＤＡＰ）褪色具有显著的催化作用，并以此反应为指示反应建立了测定微量钌的催化光度法．在Ｒｕ（Ⅲ）－ＫＩＯ４－３，５－Ｂｒ２－ＰＡＤＡＰ体系中，钌（Ⅲ）含量在０．０８０～０．３００μｇ／１０．０ｍｌ范围内符合比耳定律；在Ｒｕ（Ⅲ）－ＫＢｒＯ３－３，５－Ｂｒ２－ＰＡＤＡＰ体系中，钌（Ⅲ）含量在０．０５０～０．３０μｇ／１０．０ｍｌ范围内符合比耳定律．这两种方法具有灵敏度高、选择性好、操作简单等特点并已用于实际样品中微量钌的测定，结果令人满意．
The effect of ruthenium (Ⅲ) on the oxidation of KIO4 (or KBrO3) 2 - [(3,5-dibromo-2-pyridyl) -azo-5-diethylaminophenol (3,5-Br2- PADAP) fading has a significant catalytic effect, and as a reaction to establish the reaction for the determination of trace ruthenium catalytic spectrophotometry. In the Ru (Ⅲ) -KIO4-3,5-Br2-PADAP system, Beer’s law is obeyed for ruthenium (Ⅲ) in the range of 0.080 ~ 0.300μg / In 3,5-Br2-PADAP system, Beer’s law is obeyed in the range of 0.050 ~ 0.30μg / 10.0ml for ruthenium (Ⅲ). These two methods have the characteristics of high sensitivity, good selectivity and simple operation, and have been used in the determination of trace ruthenium in practical samples with satisfactory results.