CTMAB增敏催化动力学光度法测定痕量锰  

Determination of Trace Manganese by Catalytic Kinetic Spectrophotometry Method with CTMAB as the Sensitizer

作　　者：宋桂兰[1] 任皞[1] 李国宝[1] 杨琳[1] 

机构地区：[1]济南大学化学化工学院,山东济南250022

出　　处：《光谱学与光谱分析》2006年第8期1536-1539,共4页Spectroscopy and Spectral Analysis

基　　金：山东省教育厅开放实验室基金(SJ0402)资助

摘　　要：研究了以NTA为活化剂，CTMAB增敏，Mn（Ⅱ）催化KIO4-氧化7-（2-硝基-4-甲基苯偶氮）-8-羟基喹啉-5-磺酸（简称7P8QSS）的反应，建立了催化光度法测定痕量锰的新方法，以509nm为测定波长，Mn（Ⅱ）在O～3.2×10^-9 g·mL^-1的范围内成线性关系，检出限为3.8×101^-1 g·mL^-1，考察了20多种共存离子的影响．用于测定大米、绿豆、小米和土壤中的锰．A new catalytic spectrophotometric method for the determination of trace amount of Mn （Ⅱ） was developed. The method is based on the oxidation of 7-（2-nitryl-4-methyl phenylazo）-8-hydroxy-qinolin-5-slfonic acid by potassium periodate in the presence of nitrilo triacec acid as an activator and CTMAB as a sensitizer. The wavelengths for the determination was 509 nm. The linear range of determination is 0-3.2×10.9^g·mL^-1 for Mn（Ⅱ）. The determination limit is 3.8×10^-11 g·mL^-1. The interference of foreign ions was studied. The method can be used for the determination of Mn（Ⅱ） in mung bean, rice, cereal and soil samples.

关 键 词：CTMAB 7-(2-硝基苯偶氮)-8-羟基喹啉-5-磺酸 催化光度法 氨三乙酸 高碘酸钾 锰(Ⅱ) 

分 类 号：O657.3[理学—分析化学]