DETERMINATION OF TRACE AMOUNTS OF RARE-EARTH ELEMENTS IN TOBACCO BY ICP-MS WITH MICROWAVE ASSISTED SAMPLE DIGESTION
摘 要
采用微波消解ICP-MS测定了烟草中痕量稀土元素,探讨了采用115In-103Rh双内标元素校正系统对分析信号漂移的补偿作用及利用干扰校正因子进行氧化物及多原子离子干扰的校正,方法的检出限为0.7-2.5 ng·L-1,测定下限为0.1-0.49 ng·g-1,RSD≤15%.用于不同产地的烟草中稀土元素分析表明,稀土元素的分布特性及分馏规律与当地的土壤环境有着密切的相关性,可用于烟草源区的定性判别和鉴定.
Abstract
A method for the determination of trace amounts of rare earth elements in tobacco by ICP-MS with microwave assisted sample digestion was developed.Binary internal standards of 115In-103Rh were selected to compensate the drift of analytical signals.Multiatomic ion interference were calibrated by measuring the signal of oxides (MO+) and hydroxide (MOH+) with individual element (as La,Ce,Pr and Ba solution ) for the ratio of MO+/M+ and MOH+/M+ and calculating interference correction coefficients.The proposed method has been applied to the analysis of plant standard Reference Materials GSV-1 (bush branches and leaves),GSV-2 (bush branches and leaves),GSV-3 (poplar leaves) and GSV-4 (tea leaf).The relative standard deviations are better than 15%.The Detection limits (DL) and Quantitation limits (QL) were in the range of 0.7-2.5 ng·L-1,0.1-0.49 ng·g-1,respectively.The analysis of tobacco for different plantation area in Hubei province showed that the distribution and fractionation of REEs were related to the environment of local soil.These phenomena are good in agreement with character of soil in Hubei province.The proposed method would be useful to identify and verify the origin of tobacco.
中图分类号 O657.31
所属栏目 工作简报
基金项目 国家烟草专卖局科技专项资助
收稿日期 2004/12/24
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备注王秀季(1974-),女,河北香河人,助教,主要从事ICP光质谱技术研究.
引用该论文: WANG Xiu-ji,LI Ai-rong,XIONG Hong-chun,MA Shu-yi,TANG Min,HU Sheng-hong. DETERMINATION OF TRACE AMOUNTS OF RARE-EARTH ELEMENTS IN TOBACCO BY ICP-MS WITH MICROWAVE ASSISTED SAMPLE DIGESTION[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(7): 553~556
王秀季,李爱荣,熊宏春,马舒翼,唐敏,胡圣虹. 微波消解ICP-MS测定烟草中痕量稀土元素[J]. 理化检验-化学分册, 2006, 42(7): 553~556
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参考文献
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【2】Krachler M,Mohl C,Emons H,et al.Analytical Procedures for the Determination of Selected Trace Elements in Peat and Plant Samples by Inductively Coupled Plasma Mass Spectrometry[J].Spectrochim Acta:Part B,2002,57:1277.
【3】Hokura A,Matsuura H,Katsuki F,et al.Multielement Determination of Major to Ultratrace Elements in Plant Reference Materials by ICP-AES/ICP-MS and Evaluation of Their Enrichment Factors[J]. Anal Sci,2000,16:1611.
【4】蒋次清,毕勇,李忠,等.ICP-MS同时测定烟草及土壤中21种元素[J].烟草科学研究,2000,(2):43.
【5】谢涛,黄泳彤.用ICP-MS法测定卷烟烟气中的重金属元素[J].烟草科技,2003,(1):27.
【6】Thompson J J,Houk R S.A Study of Internal Standardization in Inductively Coupled Plasma Mass Spectrometry[J].Appl Spectrosc,1987,41(6):801.
【7】胡圣虹,林守麟,刘勇胜,等.等离子体质谱法测定地质样品中痕量稀土元素的基体效应及多原子离子干扰的校正研究[J].高等学校化学学报,2000,21(3):368.
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