【摘要】 采用顺序注射氢化物发生-原子荧光光谱法测定酒中痕量铅。在盐酸载液中加入2.5%(V/V)无水乙醇,可以对测定系统进行较好的清洗,改善了测量的稳定性。对载液酸度、硼氢化钾浓度等实验条件进行了研究,工作曲线在Pb浓度5.0～80μg/L的范围内线性关系良好,相关系数r=0.9992,检出限为0.24μg/L,相对标准偏差为1.8%,加标回收率为96%～103%。适用于白酒、葡萄酒和啤酒样品中痕量铅的测定。更多还原

【Abstract】 A method for the determination of trace lead existed in alcoholic beverage using sequential injection hydride generation-atomic fluorescence spectrometry was proposed.The detection system could be cleaned better by added 2.5%(V/ V) absolute alcohol into the HCl carrier,and the stability of detection was improved.The operation conditions including the concentrations of HCl and KBH4 were studied.There was a good linear relationship between the fluorescence intensity and lead concentration in the range of 5.0□80μg/L with a correlation coefficient of 0.9992,The detection limit was 0.24μg/ L and the relative standard deviation(n=11)was 1.8%.The recovery was in the range of 96%□103%.It is applied to the determination of trace lead in distilled spirits,wine and beer with satisfactory results.更多还原