5-氯-苯并噻唑偶氮苯甲酸光度法测定粉煤灰中微量锰(Ⅱ)  

Spectrophotometric determination of micro manganese(Ⅱ) in fine coal ash with 5-chloro-benzothiazolylazo benzoic acid

作　　者：罗道成[1] 刘俊峰[1] 

机构地区：[1]湖南科技大学化学化工学院,湘潭411201

出　　处：《分析试验室》2010年第7期56-58,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了5-氯-苯并噻唑偶氮苯甲酸(5-Cl-BTAEB)与锰的显色反应,在pH5.0的HAc-NaAc缓冲溶液中,乳化剂OP存在下,5-Cl-BTAEB与Mn(Ⅱ)反应生成2∶1稳定络合物,其最大吸收波长为650nm,表观摩尔吸光系数为1.53×105L·mol-1.cm-1。锰含量在0～440μg/L范围内符合比尔定律,方法用于测定粉煤灰中微量锰,结果与催化光度法相符,6次测定值RSD<4%。The color reaction of manganese (Ⅱ) with 5-chloro-benzothiazolylazo benzoic acid (5-Cl-BTAEB) was studied. In the pH 5.0 HAc-NaAc buffer solution with presence of OP,5-Cl-BTAEB could react with Mn(Ⅱ) to form a stable 2:1 complex,which shows a maximum absorption at 650 nm and an apparent molar absorptivity of 1.53×105 L·mol-1·cm-1. Beer s law was obeyed in the range of 0～440 μg/L for manganese. This method was applied to the determination of micro manganese in fine coal ash,and the results were in good agree...

关 键 词：分光光度法 5-氯-苯并噻唑偶氮苯甲酸 锰 粉煤灰 

分 类 号：TQ533.1[化学工程—煤化学工程]