摘要
应用AFS— 2 2 0 2a型双道原子荧光分光光度计和断续流动的氢化物发生技术 ,采用HNO3 -H2 O2 酸性体系和高压釜消解样品 ,对样品中的铅含量进行了测定 .同时 ,研究了光电管负高压、灯电流、屏蔽气和载气流量、载流的选择、酸度等对实验的影响 .在选定实验条件下 ,铅的检出限为 0 .0 8μg/L ,标准物质桃叶(GBW0 85 0 1)的验证结果与推荐值一致 ,相对标准偏差为 1.9% .该方法简便、快速、灵敏 ,对于实际中药样品的测定得到了满意的结果 .
A hydride generation-atomic fluorescence spectrometry method is developed for the determination of trace lead in traditional Chinese medicines . A high-pressure digestion using HNO_3- H_2O_2 system is applied for the pretreatment of traditional Chinese medicine samples and the interval flow precedure is used . The experimental conditions and instrumental operation parameters such as KBH_4 concentration ,flow rate of the carrier and shield gas ,currents of lamp and height of atomic,have been optimized respectively .Under the optimum conditions the detection limit is 0.08 μg/L. The coefficient of variation is not more than 1.9%. This hydride generation-atomic fluorescence spectrometry method is simple ,rapid and sensitive,so it can be used for the determination of lead in traditional Chinese medicines.
出处
《郑州大学学报（理学版）》
CAS
2003年第4期84-86,共3页
Journal of Zhengzhou University:Natural Science Edition
基金
河南省自然科学基金资助项目
编号 0 1110 2 2 90 0
关键词
氢化物发生-原子荧光法
测定
菊花
大云
铅
lead
dendyanthema
dayun
hydride generation-atomic fluorescence spectrometry
