ICP-AES测定微量碘进样装置的设计及应用  

Design and Application of Sampling Device for Determination of Trace Iodine by ICP-AES

作　　者：柴小丽[1,2,4] 高丹丹 李海军[1] 王波 杨克利[1,2] 董亚萍[1,2] 李武[1,3] CHAI Xiao-li;GAO Dan-dan;LI Hai-jun;WANG Bo;YANG Ke-li;DONG Ya-ping;LI Wu(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Technology Research and Development Center of Comprehensive Utilization of Salt LakesResources,Xining,810008,China;Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海盐湖资源综合利用技术研究开发中心,青海西宁810008 [3]青海省盐湖资源化学重点实验室,青海西宁810008 [4]中国科学院大学,北京100049

出　　处：《盐湖研究》2021年第2期94-101,共8页Journal of Salt Lake Research

基　　金：青海省重大科技专项(2019-GX-A7);国家重点研发计划课题(2017YFC0602805);中国科学院仪器设备功能开发技术创新项目(No.2020g103)。

摘　　要：针对电感耦合等离子体原子发射光谱(ICP-AES)直接测定碘灵敏度低、检出限高的问题,本文设计了一种用于微量碘测定的ICP-AES进样装置。采用该装置可大幅降低ICP-AES对碘的检出限,同时降低了卤水中常见共存离子对碘测定的干扰。采用该装置3 min可完成一次测定,方法线性范围为1.65~10000μg·L^(-1)。将建立的方法用于实际卤水(包括南翼山油田水和达州深部地下卤水)中微量碘的测定,加标回收率为96%~104%,测定的RSD小于2%。In order to solve the problems of low sensitivity and high detection limit of direct determination of iodine by inductively coupled plasma atomic emission spectrometry(ICP-AES),an ICP-AES sampling device for the determination of trace iodine was designed.The device could greatly reduce the detection limit of iodine by ICP-AES and the interference of common coexisting ions in brine.A measurement could be completed within 3 minites by this device,and the linear range of the established method was from 1.65 to 10000μg·L^(-1).The method was applied to the determination of trace iodine in practical brine(including the oilfield brine in Nanyi Mountain and the deep underground brine in Dazhou),the recoveries were in range of 96%~104%,and the RSD of determination was lower than 2%.

关 键 词：碘 装置 卤水 ICP-AES 

分 类 号：O657.31[理学—分析化学]