原子吸收法测定中药材中6种重金属及有害元素的残留量

目的:建立中药中6种重金属及有害元素(铅、镉、砷、汞、铜、锑)的检测方法,测定6种中药材中的残留含量。方法:样品经微波消解,采用石墨炉原子吸收法测定铅、镉、锑;采用氢化物-原子吸收法测定砷;采用冷原子吸收法测定汞;采用火焰原子吸收法测定铜,并对测定方法进行了方法学考察。结果:6种重金属及有害元素的回收率为79.0%～125.8%,RSD 为0.8%～14.6%。结论:该方法简便,准确,可较好地用于中药重金属及有害元素残留量的测定。

Atomic absorption spectrometry determination of six heavy metal and deleterious elements in Chinese herbs

Objective:To determine the content of six heavy metal and deleterious elements(Pb,Cd,As,Hg,Cu and Sb)in six Chinese herbs.Methods:Samples were digested with microwave digestion system,and the Pb,Cd,Sb were determined by graphite furnace atomic absorption spectrometry(GFAAS);the As was determined by hydride generation atomic absorption spectroscopy(HGAAS);the Hg was determined by cold vapour atomic absorption spectroscopy(CVAAS);the Cu was determined by flame atomic absorption spectrometry(FAAS)and examine the reproducibility and recovery of the method.Results:The recovery was 79.0%-125.8% ,RSD was 0.8%- 14.6%.Conclusions :The method is simple and accurate and can be used in the determination of heavy metal and deleterious elements in Chinese herbs.