氢化物-原子荧光光谱法检测生活饮用水中的痕量铅  

Determination of Trace Plumbum in Drinking Water by Hydride-Atomic Fluorescence Spectrometry

作　　者：彭俊 杨淞 朱光辉[2] 杨蕾 叶红利 

机构地区：[1]昆明市西山区疾病预防控制中心,昆明市兴苑路兴隆小区14幢650118 [2]云南大学现代分析测试中心,昆明市一二一大街182号650091

出　　处：《光谱实验室》2011年第3期1388-1392,共5页Chinese Journal of Spectroscopy Laboratory

基　　金：昆明市西山区2010年科技专项项目(20100112)

摘　　要：建立一种简便准确的氢化物-原子荧光光谱法检测生活饮用水中痕量铅的方法。在酸性介质中,以铁氰化钾为氧化剂,2%的盐酸为载流,样品中的铅与硼氢化钠(N aBH4)或硼氢化钾(KBH4)反应生成铅的挥发性氢化物(PbH4),将氢化物导入原子化器中,检测其荧光强度。铅在0.00—30.0μg/L范围内,荧光强度值与铅浓度相关系数r>0.9990,铅的最低检出限为0.0597μg/L,相对标准偏差RSD在1.00%—3.50%之间,加标回收率在90.00%—107.24%之间。应用氢化物-原子荧光法检测生活饮用水中痕量铅,具有操作简便、线性关系好、检出限低、重复性好、回收率高、结果准确的优点,且分析成本低廉,便于推广应用。The method for sample and accurate determination of trace plumbum in drinking water was established by hydride-atomic fluorescence spectrometry.In acidic medium,with potassium ferricyanide as the oxidant and hydrochloric acid concentration of 2% as the current-carrying,the lead in samples reacted with sodium borohydride（NaBH4） or potassium borohydride（KBH4） to form plumbic volatile hydride（PbH4）,the hydride was guided into atomizer to detection of fluorescence intensity.Plumbum concentration was in the range of 0.00—30.0μg/L,and the correlation coefficients of fluorescence intensity value with plumbum concentration were greater than 0.9990,and limit of detection for plumbum was 0.0597μg/L with RSD was between 1.00% and 3.50%,while additional standard recovery was from 90.00% to 107.24%.The hydride-atomic fluorescence spectrometry is applied to detect trace plumbum in drinking water,not only has simple operation,good linear relationship,low detection limitation,good repeatability,high efficiency and accuracy,but has low cost analysis and easy application.

关 键 词：原子荧光光谱法 生活饮用水 痕量铅 

分 类 号：O657.31[理学—分析化学]