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高效液相色谱-电感耦合等离子体质谱法测定土壤中不同形态的无机碘 预览

Determination of Different Inorganic Iodine Species in Soils by High Performance Liquid Chromatography-Inductively Coupled Plasma-Mass Spectrometry
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摘要 建立了一种有效分离检测土壤中不同形态无机碘(碘离子和碘酸根离子)的高效液相色谱-电感耦合等离子体质谱法(HPLC-ICP-MS)。采用4 mmol/L四丁基氢氧化铵(TBAH)溶液为提取剂进行超声提取,经离心分层,过Na柱和0.22μm滤膜后进行分析,以50 mmol/L碳酸铵溶液(pH 9.8,以25%氨水调节)为流动相,采用AS16阴离子分析柱进行HPLC-ICP-MS测定。结果表明,在优化实验条件下,两种无机碘形态(I-和IO-3)在10~500μg/L范围内线性关系良好,相关系数(r 2)均大于0.999,检出限分别为0.05、0.1μg/L,定量下限分别为2、5μg/L。该方法用于土壤环境中无机碘的测定,其加标回收率为83.8%~108%,相对标准偏差(RSD)为0.5%~3.0%,优于振荡提取法。该方法快速、高效、重现性好、灵敏度高,适用于土壤环境中不同形态无机碘的测定。 A method was established for the separation and determination of different inorganic iodine species(iodide and iodate ions)in soils by high performance liquid chromatography and inductively coupled plasma-mass spectrometry(HPLC-ICP-MS).The sample was ultrasonically extracted with 4 mmol/L tetrabutylammonium hydroxide(TBAH)solution.After centrifugation,the sample was purified with Na column and 0.22μm hybrid filter membrane.The determination was performed by HPLC-ICP-MS combined with a Dionex IonPac AS16 anion exchange column using 50 mmol/L ammonium carbonate(pH 9.8)as mobile phase.Results indicated that the linear ranges for two inorganic iodine species(I-and IO-3)ranged from 10μg/L to 500μg/L with correlation coefficients(r 2)greater than 0.999.The limits of detection for the two iodine species were 0.05μg/L and 0.1μg/L,and the limits of quantitation were 2μg/L and 5μg/L,respectively.The method was applied in the determination of two inorganic iodine species in soils,with spiked recoveries of 83.8%-108%and relative standard deviations(RSD)of 0.5%-3.0%,which were better than those obtained by the oscillation extraction.With the advantages of rapidness,high efficiency,good reproducibility and high sensitivity,the method is suitable for the determination of different inorganic iodine species in soils.
作者 胡梦娜 周启星 陈翠红 刘维涛 HU Meng-na;ZHOU Qi-xing;CHEN Cui-hong;LIU Wei-tao(Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Technological Center of Urban Pollution Diagnoses and Remediation Engineering,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China)
出处 《分析测试学报》 CAS CSCD 北大核心 2019年第11期1389-1392,共4页 Journal of Instrumental Analysis
基金 国家自然科学基金面上项目(21677080) 高等学校学科创新引智计划(111计划)资助”(T2017002) 中央高校基本科研业务费专项资金 国家自然科学基金委-山东省政府联合基金重点项目(U1806216)。
关键词 高效液相色谱-电感耦合等离子体质谱法(HPLC-ICP-MS) 土壤环境 无机碘 形态 high performance liquid chromatography-inductively coupled plasma-mass spectrometry(HPLC-ICP-MS) soil inorganic iodine species
作者简介 通讯作者:周启星,博士,教授,研究方向:土壤环境、生态地球化学、污染环境修复及环境基准,E-mail:zhouqx@nankai.edu.cn。
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