耐尔蓝-高碘酸钾-溴代十六烷基吡啶-氨三乙酸体系催化动力学光度法测定锰  

Nile Blue-Potassium Periodate-Cetyl Pyridine Bromide-Nitrilotriacetic Acid System for Catalytic Spectrophotometric Determination of Manganese

作　　者：高峰[1] 张德兴[1] 葛治清[1] 王伦[1] 

机构地区：[1]安徽师范大学化学与材料科学学院,芜湖241000

出　　处：《分析化学》2003年第10期1217-1219,共3页Chinese Journal of Analytical Chemistry

基　　金：安徽省教育厅自然科学基金 (No .2 0 0 3kj14 4 );安徽省青年教师基金 (No .2 0 0 3jq10 4);安徽师范大学青年基金资助项目

摘　　要：在增敏剂溴代十六烷基吡啶和活化剂氨三乙酸存在的条件下 ,锰 对高碘酸钾氧化耐尔蓝的反应具有催化作用 ,据此建立了测定锰的新方法。该法具有很高的灵敏度和选择性。在最优化的实验条件下 ,其线性范围为 0 .4～ 5 .6 μg L ;检出限为 0 .0 5 4μg L (n =8) ;相对标准偏差为 3.8%。用于水样、蔬菜样品中锰含量的测定 ,结果令人满意。A new catalytic spectrophotometric method for the determination of trace amount of Mn(II) has been developed. The method was based on the catalytic effect of Mn(II) on the oxidation of nile blue (NB) by potassium periodate in the presence of nitrilotriacetic acid (NTA) as an activator and cetyl pyridine bromide (CPB) as a sensitizer. The reaction mechanism has also been discussed. The results showed that the method had high sensitivity and selectivity. At the optimum experimental conditions, the linear range was 0.4 similar to 5.6 mug/L, the detection limit was 0.054 mug/L, and the RSD was 3.8% (n = 8). The method was used to the determination for Mn(II) in water samples and vegetables with satisfactory results.

关 键 词：耐尔蓝-高碘酸钾-溴代十六烷基吡啶-氨三乙酸体系 催化动力学光度法 测定 锰离子 水样 蔬菜样品 

分 类 号：O657.3[理学—分析化学]