新试剂咪唑偶氮对甲基苯双波长标准加入法同时分光光度法测定钴镍研究  

Simultareous Spectrophotometric Determination of Cobalt and Nickel in Mixtures with a New Reagent Imidazolylazo-4-Methylphenyl by Two-wavelength Standard Addition Method

作　　者：邵红[1] 程远杰[1] 夏心泉[1] 

机构地区：[1]沈阳化工学院,辽宁沈阳110021

出　　处：《化学世界》2002年第5期236-238,共3页Chemical World

摘　　要：2- ( 2′-咪唑偶氮 ) - 4- (甲基苯 )与钴、镍均有灵敏的显色反应 ,但两个配合物的吸收光谱重叠 ,以测定钴的波长组合 ( 4 5 0 ,478nm)为测定波长对 ,以钴作标准加入组份 ,用双波长标准加入法同时测定低合金钢中的微量钴和镍 。In a buffer medium of NH 3 NH 4Cl at pH 9.5, cobalt and nickel react with imidazolylazo 4 methylphenyl (IAP 4M) to form colour complexes. The maximum absorption of the two complexes occur respectively at 450 and 470 nm, but it is difficult to differentiate the two absorption spectra. By applying two wavelength standard addition method, the concentration of cobalt and nickel in mixtures could be simultaneously determined. This method has the advantages of high sensitivity, good selectivity and simple operation. When it was applied to simultaneous determination of cobalt and nickel in alloy steel sanoples satisfactory results were obtained.

关 键 词：分光光度法 测定 2-(2′-咪唑偶氮)-4-甲基苯 双波长标准加入法 钴 镍 显色反应 低合金钢 微量分析 

分 类 号：TG115.33[金属学及工艺—物理冶金] O657.32[金属学及工艺—金属学]