催化光度法测定煤矸石中微量钴  

CATALYTIC PHOTOMETRIC DETERMINATION OF MICROAMOUNTS OF COBALT IN COAL GANGUE

作　　者：李晓湘[1] 唐冬秀[1] 宋和付[1] 

机构地区：[1]湘潭工学院化工系,湘潭411201

出　　处：《理化检验（化学分册）》2002年第8期396-397,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：煤炭部科技发展基金项目 ( 96 - 36 1)

摘　　要：在氨水介质中钴(Ⅱ )能催化均二苯基卡巴腙被溶解氧氧化而褪色 ,考察分析了此法的测定条件 ,并应用该法测定了煤矸石中微量钴。试验表明 ,钴量在 0～ 0 .5 μg/2 5ml符合比耳定律 ,摩尔吸光系数ε=1 .3 5× 1 0 6L·mol-1·cm-1。In an ammoniacal solution of pH 9～10, the color fading of sym diphenylcarbazone through its oxidation by dissolved oxygen was catalyzed by the presence of trace amounts of cobalt(Ⅱ). The intensity of color fading kept a linear relationship with concentration of cobalt(Ⅱ) in the range 0～0.5μg per 25ml of solution giving a molar absorptivity of 1.35×10 6L·mol -1 ·cm -1 . Absorbance measurements were made at 490nm with 1cm absorption cell. Based on the reaction conditions mentioned above, a method for the determination of micro amounts of cobalt in coal gangue was proposed.

关 键 词：测定 煤矸石 钴 催化光度法 均二苯基卡巴腙 微量分析 

分 类 号：O614.812[理学—无机化学] O657.32[理学—化学]