DBOK-偶氮氯膦退色反应在测定痕量钌中的应用  

Application of DBOK-CPA Fading Reaction to Determination of Trace Ru

作　　者：金灵芬[1] 曹文侠[1] 刘锡林[1] 寇宗燕[1] 

机构地区：[1]甘肃教育学院化学系

出　　处：《贵金属》1998年第4期38-40,共3页Precious Metals

摘　　要：在酸性介质中，高碘酸钾与显色剂ＤＢＯＫ－偶氮氯膦的退色反应，只有在痕量Ｒｕ（Ⅲ）的催化作用下才能实现，其退色度与Ｒｕ量具有良好的线性关系。作者研究其反应的最佳条件，建立了痕量Ｒｕ的催化分光光度分析法。检出限００１μｇ／１０ｍｌ，Ｒｕ００２～０２０μｇ／１０ｍｌ内符合比尔定律。此法简便准确，选择性较好，可用于贵金属精矿等样品中痕量Ｒｕ的测定。The fading reaction of KIO 4 with DBOK-CPA in acid medium can be realized only under catalytic action of trace Ru(Ⅲ).There is better linear relationship between fading degree and Ru content.Authors have investigated the optimum condition of the reaction and established catalytic spectrophotometry of trace Ru.The detection limit is 0 01 μg/10ml and Beer's law is obeyed in the range of 0 02～0 20μg/10ml.The method offers the advantages of simple,accurate,and better selectivity,and has been applied to the determination of trace Ru in refined precious metals ores.

关 键 词：偶氮氯膦 高碘酸钾 催化分光光度法 钌 

分 类 号：O614.821[理学—无机化学]