期刊论文

中文

微量元素与健康研究

1005-5320

2011

28

2

44-47

本校为第一机构

目的:建立快捷、灵敏检测锰(Ⅱ)的催化共振光散射新方法.方法:基于硫酸介质中,锰(Ⅱ)能催化溴酸钾氧化铬天青S(CAS)的反应.使其与溴化十六烷基三甲胺(CTMAB)缔合产生的共振光散射强度减弱,在一定条件下,共振光散射强度减小值与溶液中锰(Ⅱ)浓度成正比,据此建立了一种催化共振光散射分析法测定锰(Ⅱ)的新方法.结果:方法的线性范围为0.02～0.70μg/ml,检出限4.0μg/L,相对标准偏差为1.08～1.39%(n=11),样品加标回收率96.0%～102.7%.结论:方法灵敏度高、精密度好,用于水样、人发中痕量锰的测定,结果满意.

Objective： To establish a rapid and sensitive method for the analysis of trace Mn（Ⅱ） by catalytic resonance light scattering method.Methods：The results showed that there was a evident catalytic effect of Mn（Ⅱ） on the oxidation reaction of Chromeazurol S by potassium bromate in sulphuric acid medium.The system appeared the maximum RLS intensity of the CAS-CTMAB at 504 nm,the decreased intensity of RLS was directly proportional to the concentration of Mn（Ⅱ） under certain conditions.Results：The linear range was 0.02～0.70 μg/ml,the de...