银(Ⅰ)催化抗坏血酸还原偶氮胂Ⅲ反应的研究及痕量银的测定  

Study on the catalysis of silver(Ⅰ) in arsenazoⅢ-ascorbic acid decolorizing reaction and determination of trace silver

作　　者：白祖海[1] 周方钦[1] 周含英[1] 江放明[1] 赵印安[1] 

机构地区：[1]湘潭大学化学学院,湘潭411105

出　　处：《分析试验室》2004年第11期56-58,共3页Chinese Journal of Analysis Laboratory

基　　金：湖南省教育厅自然科学基金资助项目(02C576)

摘　　要：研究了在柠檬酸 K2HPO4介质中,银(Ⅰ)催化抗坏血酸还原偶氮胂Ⅲ的褪色反应。考察了影响反应的条件,探讨了有关动力学问题,建立了一种测定痕量银的新方法。方法的检出限为9.35×10-11g mL,测定范围为0～0.04μg mL,相对标准偏差为2.6%,回收率在98.5%～101%。Using dipotassium hydrogen phosphate and citric acid as medium, the decolorizing reaction of arsenazoⅢ with ascorbic acid catalyzed by silver (I) was studied. A new method for determination of silver(Ⅰ) was developed after studying optimum condition and mechanism of the reaction. The calibration curve was linear for silver(I) in the range of 0～40 μg/L with a detection limit of 9.37×10^(-11) g/mL, relative standard deviation of 2.6% and recoveries of 98.5%～101%.

关 键 词：催化光度法 抗坏血酸 偶氮胂Ⅲ 银 

分 类 号：O557.32[理学—热学与物质分子运动论]