5-[2-(4-氯苯酚)偶氮]-若丹宁分光光度法测定钼Ⅵ  

Spectrophotometric determination of molybdenum with 5-[2-(4-chlorophenol)azo]-rhodanine

作　　者：谭秀芳[1] 潘教麦[2] 

机构地区：[1]新疆医科大学基础医学院化学教研室,新疆乌鲁木齐830054 [2]华东师范大学化学系,上海200062

出　　处：《冶金分析》2003年第4期34-35,共2页Metallurgical Analysis

摘　　要：介绍了用 5 [2 ( 4 氯苯酚 )偶氮 ] 若丹宁光度法测定微量钼 的方法 ,在H2 SO4 和H3PO4 介质中 ,在VC和表面活性剂溴化十六烷基三甲基铵 (CTMAB)存在下 ,钼与显色剂形成 1∶2桔红色络合物 ,最大吸收波长为 462nm ,表观摩尔吸光系数为 5 0 6× 10 5,于 2 5mL溶液中 ,钼 量在 0 5～ 5 μg范围内符合比尔定律。A spectrophotometric method for determination of micro amounts of molybdenum with the reagent 5 [2 (4 chlorophenol)azo] rhodanine is described In H 2SO 4 and H 3PO 4 medium,molybdenum reacts with the reagent in the presence of CTMAB to form a 1∶2 orange complex,which has an absorption maximum at 462nm with a molar absorptivity of 5 06×10 5L·mol -1 ·cm -1 Beer's law is obeyed in the range of 0 5-5μg of molybdenum in 25mL of solution The method has been applied to the determination of micro amounts of molybdenum in human hair

关 键 词：人发 钼 测定 分光光度法 CTMAB 若丹宁 

分 类 号：TG115.3[金属学及工艺—物理冶金]