ICP-AES测定5种止咳类中药材重金属含量  

Determination of Heavy Metal Elements in Five Antitussive Chinese Herbal Medicines by ICP-AES

作　　者：苏娟[1] 吴仪[2] 刘忠华[1] 

机构地区：[1]西南石油大学理学院,成都市新都区新都大道1号610500 [2]成都理工大学材料与化学化工学院

出　　处：《光谱实验室》2011年第6期2898-2900,共3页Chinese Journal of Spectroscopy Laboratory

基　　金：西南石油大学科研资助项目(No.X189)

摘　　要：采用硝酸-高温灰化对5种止咳类中药材中金属元素进行消解,用电感耦合等离子体-原子发射光谱法测定了试样中Pb、Cu、Cr、Cd、As 5种重金属元素含量。结果表明,5种止咳类中药材中重金属含量差异显著,铅元素在紫菀、枇杷叶和白前3种中药材中的含量超过国家标准,砷元素在紫菀、白前、杏仁和前胡4种中药材中的含量也超过了国家标准,不利于这些药材的药用和出口。该法中加标回收率为93.87%—99.21%,相对标准偏差为0.42%—3.22%(n=6),具有良好的精密度和准确度。可作为该类中药材重金属含量快速检测和控制的方法。The contents of heavy metal elements,including Pb,Cu,Cr,Cd,As,in five antitussive Chinese herbal medicines were determined by inductively coupled plasma-atomic emission spectrometry（ICP-AES） with nitric acid-high temperature ashing digestion.The difference of contents of the heavy metal elements among five antitussive Chinese herbal medicines was distinct.Furthermore,the content of Pb in Radix asteris,Rhizoma cynanchi stauntonii,Folium eriobotryae and that of As in Radix asteris,Rhizoma cynanchi stauntonii,Bitter apricot kernel,Root of whiteflower hogfennel exceeded national standards of Chinese herbal medicines,that was adversely to herb and export.The recoveries of standard addition method were 93.87% —99.21%,while the RSD（n=6）was 0.42%—3.22%.The method is sensitive and precise,and can quickly detect and control the content of heavy metal elements of the antitussive Chinese herb medicines.

关 键 词：电感耦合等离子体-原子发射光谱法 中药材 止咳 重金属元素 

分 类 号：O657.31[理学—分析化学]