催化动力学分析法测定痕量锰的研究  

Catalytic kinetic spectrophotometric determination of trace manganese

作　　者：韩秀丽[1] 李红萍 刘耀民[3] 

机构地区：[1]郑州大学化工学院,河南郑州450002 [2]河南省三门峡市环境检测站,河南三门峡472000 [3]濮阳职业技术学院,河南濮阳457000

出　　处：《河南科学》2006年第1期35-37,共3页Henan Science

摘　　要：研究了在HAc-NaAc介质中,以氨三乙酸(NTA)为活化剂,锰(Ⅱ)离子催化高碘酸钾氧化溴甲酚绿的褪色反应,建立了测定痕量锰的新方法.实验结果表明:方法的线性范围为10-120ng/25ml,检测限为0.21ng/ml,用于黄河水中锰的测定,结果满意.A new catalytic spectrophotometry method for the determination of trace manganese has been developed. The method is based on the oxidation of bromocresol green with potassium periodate using manganese as a catalyst and nitrilo triacetic acid as an activator in a solution of HAc-NaAc. The results show that the detection limit of Mn is 0.21ng/ml, and the linear range of determination is 10-120ng/25ml. The method has been applied to the determination of Mn in Yellow River water with satisfactory results.

关 键 词：锰 催化动力学分析法 溴甲酚绿 

分 类 号：O657.32[理学—分析化学]