ICP-AES内标法测定罗汉参中7种微量元素的含量  

Determination of seven trace elements of Luohanshen by ICP-AES internal standard method

作　　者：张修景[1] 

机构地区：[1]菏泽学院化学化工系,山东菏泽274015

出　　处：《食品与发酵工业》2014年第12期181-184,共4页Food and Fermentation Industries

基　　金：山东省"十二五"重点学科应用化学资助项目(No:2011350-1)

摘　　要：测定罗汉参中微量元素（Ca、Fe、Zn、Cu、Se、Mn、Mg）的含量。建立了微波消解-电感耦合等离子体（ICP）原子发射（AES）内标法测定罗汉参中微量元素含量的方法（以Ni为内标物）,对微波消解样品条件以及仪器参数进行了优化。测量的相对标准偏差（n=5）〈3.02%;线性相关系数分别为0.995 4～0.999 7,加标回收率在98.0%～102.5%;求得7种元素的检出限（3S/N）是0.001～0.02mg/L。该方法具有灵敏度高、检出限低、线性范围宽、干扰小、选择性高、快速测定多种元素的优点;用于罗汉参中微量元素的测定,结果满意。The content of the trace elements（ Ca,Fe,Zn,Cu,Se,Mn,Mg） of Luohanshen was determined.The microwave digestion and inductively coupled plasma（ ICP） atomic emission（ AES） internal standard method（ using Ni as internal standard） to determine trace element contents was established. The microwave digestion conditions and analysis parameters were optimized. The relative standard deviation（ n = 5） measured was less than 3. 02%. The linear correlation coefficients were between 0. 995 4 to 0. 995 7. The average recoveries were between 98. 0% to102. 5%. The detection limits of the seven elements（ Ca,Fe,Zn,Cu,Se,Mn,Mg） obtained were between0. 001 mg / L to 0. 2mg / L. The method has many advantagessuch as,high sensitivity,low detection limit,wide linear range,low interference,high selectivity,rapid determination of multi elements,etc. The results are satisfactory to determine the trace elements of Luohanshen.

关 键 词：罗汉参 微波消解 电感耦合等离子体原子发射 内标法 微量元素 

分 类 号：O657.31[理学—分析化学]