催化共振光散射法测定痕量锰(Ⅱ)  

Determination of trace Mn(Ⅱ) by catalytic resonance light scattering method

作　　者：刘云富[1] 李贵荣[2] 谭广辉[1] 

机构地区：[1]惠州市职业病防治院,广东惠州516008 [2]南华大学公共卫生学院,湖南衡阳421001

出　　处：《微量元素与健康研究》2011年第2期44-47,共4页Studies of Trace Elements and Health

摘　　要：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 detection limit was 4.0 μg/L,the relative standard deviation was between 1.08% and 1.39%（n=11）,and the recovery were 96.0%～102.7%.Conclusion：The method has the advantage of simplicity,high sensitivity,and had been applied to the determination of trace Mn^2＋ in water,human hair samples to achieve satisfactory results.

关 键 词：催化共振光散射法 锰 铬天青S 溴化十六烷基三甲胺 

分 类 号：O657.3[理学—分析化学]