氢化物-原子荧光光谱法检测生活饮用水中的痕量铅

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(NaBH<,4>)或硼氢化钾(KBH<,4>)反应生成铅的挥发性氢化物(PbH<,4>),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...

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

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.