蒸气发生-电感耦合等离子体质谱法测定碘  

Vapour generation inductively coupled plasma mass spectrometry in determination of iodine

作　　者：李景喜[1] 张建平[1] 庄峙厦[1] 

机构地区：[1]厦门大学化学化工学院化学系,现代分析科学教育部重点实验室,厦门361005

出　　处：《分析试验室》2008年第3期21-24,共4页Chinese Journal of Analysis Laboratory

基　　金：福建省重大科技(2003Y005)和(2003Y003);国家自然科学基金项目资助

摘　　要：建立了一种在线化学蒸气发生-电感耦合等离子体质谱测定碘的方法。利用碘负离子的还原性,采用氧化还原手段,将碘负离子氧化为碘单质;然后通过碘单质的易挥发特点,将碘蒸气直接导入等离子体。该方法可以提高传输效率,改善样品利用率,使检测灵敏度得到极大的提高。方法的检出限为0.22μg/L,样品加标回收率在87.4%-97.75%之间,RSD（n=11）在3%以内。实验中预先将正5价碘还原成碘负离子,然后加入氧化剂将碘负离子氧化成碘单质进行检测;对碘的形态化学蒸气发生法进行了尝试。An on line vapour generation ICP-MS method for the determination of iodine was established. In the paper, depending on the deoxidization of the I^- and the means of oxidization, sensitivity was raised due to improving transfer efficiency by using the technique which the I^- was oxidized to I that was volatile before being detected. Detection limit of the method was 0.22 μg/L, Recoveries obtained were in range of 87.4% - 97.75% and RSD （n = 11） was less than 3 %. In the study, I^5 ＋ was deoxidized to I^- in advance, and then I^- was oxidized to I before being detected.

关 键 词：碘 蒸气发生 ICP-MS 

分 类 号：O657.6[理学—分析化学]