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微波消解-ICP-AES法测定玉米芯中的微量元素含量
引用本文:孙勇,张金平,杨刚,李佐虎.微波消解-ICP-AES法测定玉米芯中的微量元素含量[J].光谱学与光谱分析,2007,27(7):1424-1427.
作者姓名:孙勇  张金平  杨刚  李佐虎
作者单位:1. 中国科学院过程工程研究所,国家生化工程重点实验室,北京,100080;中国科学院研究生院,北京,100039
2. 中国科学院过程工程研究所,国家生化工程重点实验室,北京,100080
基金项目:国家重点基础研究发展计划(973计划)
摘    要:采用微波消解处理样品,以电感耦合等离子体发射光谱法(ICP-AES)测定了我国北京、山东、吉林、云南、新疆、甘肃、山西、陕西、江苏、内蒙十个省区玉米芯中Zn,Mg,Mn,Sr,Fe,Pb,Cu和Se八种元素的含量.加入1.5 mL 68%的HNO3以及0.5 mL HF作为消解剂,在400 W微波功率下3步即可完全将样品消解.测定上述八种元素的相对偏差及回收率分别为:0.72%~4.16%,95.5%~104.5%;1.58%~3.66%,98.2%~103.5%;0.19%~4.58%,97.0%~103.2%;1.31%~4.90%,95.7%~104.1%;1.40%~4.01%,95.9%~104.6%;1.55%~4.28%,95.1%~104.5%;2.16%~5.00%,96.4%~103.5%; 2.00%~4.99%,95.1%~101.3%.方法快速、简便、灵敏度高、准确性好,可多元素同时测定,且无损失和环境污染小.

关 键 词:微波消解  ICP-AES  玉米芯  微量元素
文章编号:1000-0593(2007)07-1424-04
修稿时间:2006-05-102006-08-20

Analysis of Trace Elements in Corncob by Microwave Digestion-ICP-AES
SUN Yong,ZHANG Jin-ping,YANG Gang,LI Zuo-hu.Analysis of Trace Elements in Corncob by Microwave Digestion-ICP-AES[J].Spectroscopy and Spectral Analysis,2007,27(7):1424-1427.
Authors:SUN Yong  ZHANG Jin-ping  YANG Gang  LI Zuo-hu
Institution:1. National Key Laboratory of Biochemical Engineering, Institute Of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China ;2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Abstract:The contents of trace elements of Zn,Mg,Mn,Sr,Fe,Pb,Cu and Se in the corncob collected from Beijing,Shandong,Jilin,Yunnan,Xinjiang,Gansu,Shanxi,Shaanxi,Jiangsu,Neimeng in China were determined by ICP-AES using microwave digestion.The optimum condition of digesting the corncob was: put 1.5 mL of 68% nitric acid and 0.5 mL of hydrofluoric acid in the pot,then digested the sample with 3 steps under the 400 W power in the microwave oven.This digesting procedure could completely and quickly digest the sample.The relative standard deviations and recovery yield are 0.72%-4.16% and 95.5%-104.5% for Zn,1.58-3.66% and 98.2%-103.5% for Mg,0.19%-4.58% and 97.0%-103.2% for Mn,1.31%-4.90% and 95.7%-104.1% for Sr,1.40%-4.01% and 95.9%-104.6% for Fe,1.55%-4.28% and 95.1%-104.5% for Pb,2.16%-5.00% and 96.4%-103.5% for Cu,and 2.00%-4.99% and 95.1%-101.3% for Se,respectively.The analysis of the trace metals by the method of ICP-AES using the method of microwave digestion proved to be easily operational,rapid,highly sensitive,and accurate.It could be adopted as the method of determining many elements simultaneously.
Keywords:Microwave digestion  ICP AES  Corncob  Trace elements
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