ICP-MS测定生活饮用水中铁的干扰及其消除  

Interferace of determinating iron in drinking water by inductively coupled plasma mass spectrometry and its elimination

作　　者：彭荣飞[1] 侯建荣[1] 黄聪[1] 于桂兰[1] 卓召模[1] 贺小平[1] 

机构地区：[1]广州市疾病预防控制中心,广州510080

出　　处：《中国卫生检验杂志》2009年第7期1509-1511,共3页Chinese Journal of Health Laboratory Technology

基　　金：广东省医学科研课题(A2008571);广州市医学科研课题(2007-YB-122;2007-YB-123)

摘　　要：目的:研究ICP-MS测定生活饮用水中铁的干扰情况并采用合适手段来消除。方法:比较不同接口、不同同位素、使用内标前后对测定结果的影响。结果:X i接口具有更低的背景强度和背景等效浓度。采用56Fe和混合内标可完全消除质谱干扰和非质谱干扰,测定结果和原子吸收法一致,方法的精密度、检出限和加标回收结果均符合分析要求。结论:可采用X i接口ICP-MS准确测定生活饮用水中的铁。Objective：To study the interference when determining iron in water by inductively coupled plasma mass spectrometry, and use appropriate measure to eliminater interference. Methods：Comparing the results in different inteface, different isotope, comparing results before and after using internal standardization. Results：The background intensity and BEC （Background Equivalent Concentration） of Xi inteface were lower than HPI interface. Using ^56Fe isotope and internal standardization could eliminate mass spectroscopic interference and non - spectroscopic interference completely. The results of analyzing practical samples were the same as using FAAS（Flame atomic absorption spectrometry）, the results of the detections of limit,RSD and recoveries were satisfactory. Conclusion：Using Xi interface inductively coupled plasma mass spectrometry can determine iron in drinking water well.

关 键 词：ICP-MS Xi接口 铁 生活饮用水 

分 类 号：O657.63[理学—分析化学]