同位素稀释多接收电感耦合等离子体质谱法测量红酒中的痕量铁  

Determination of Trace Iron in Red Wine by Isotope Dilution Mass Spectrometry Using Multiple-Collector Inductively Coupled Plasma Mass Spectrometry

作　　者：周涛[1] 王军[1] 逯海[1] 周原晶[1] 李海峰[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《原子能科学技术》2009年第11期992-996,共5页Atomic Energy Science and Technology

基　　金：国家科技部支撑计划资助项目(2006BAF07B03)

摘　　要：使用同位素稀释技术,采用配有六极杆碰撞室的多接收电感耦合等离子体质谱,对红酒标准物质中铁含量进行了测量,得到高精密度同位素丰度比测量结果。同时采用相对测量方法ICP-MS和ICP-OES对红酒样品中的铁含量进行了测量,并与同位素稀释质谱法进行了比较,结果符合一致。方法的不确定度分析包含了实验过程中每个步骤所产生的不确定度和使用的标准物质的不确定度,其中,流程空白对方法检测限和精密度的影响不容忽视。建立的红酒中痕量铁含量的同位素稀释质谱方法为标准物质的定值提供了技术支持。This paper introduces determination of trace iron in red wine certified reference material by isotope dilution mass spectrometry （IDMS） method using a multiple-collector inductively coupled plasma mass spectrometry, equipped with a hexapole collision cell. The measurement procedure of iron isotopic abundance ratios was deeply researched. Reduced polyatomic ion interferences to iron isotopes ion by collision reaction using Ar and H2 gas, high precise isotopic abundance ratios were achieved. Two relative measurement methods （ICP-MS and ICP-OES） were used to analyze trace iron in red wine. The results are compared with IDMS results, which indicate that they are accordant. The uncertainty analyses include each uncertainty factor in whole experi- ment and the uncertainty of used certified reference material and it shows that the procedure blank is not neglectable to detect limit and precision of the method. The establishment of IDMS method for analysis of trace iron in red wine supports the certification of certified reference materials.

关 键 词：多接收电感耦合等离子体质谱 同位素稀释质谱法 铁 红酒 

分 类 号：O657.63[理学—分析化学] O614.243[理学—化学]