离子色谱-柱切换法测定土壤浸出液中的氟离子  

Determination of fluoride in soil water extract by ion chromatography with column-switching technique

作　　者：姜新华[1] 倪承珠 朱彬和 赵训燕 陈素清[3] 吕伟德[4] 张嘉捷[2] 张培敏[2] 李刚 朱岩[2] 

机构地区：[1]浙江衢化医院,浙江衢州324004 [2]浙江大学化学系,浙江杭州310028 [3]台州学院医药化工学院,浙江台州317000 [4]杭州职业技术学院临江学院,浙江杭州310018 [5]绍兴市环境监测中心站,浙江绍兴312000

出　　处：《色谱》2016年第4期442-446,共5页Chinese Journal of Chromatography

基　　金：国家重大科学仪器设备开发专项(2012YQ09022903);浙江省微量有毒化学物健康风险评估技术研究重点实验室项目(2014006;2014007);浙江省自然科学基金项目(LZ16B050001;LY15B050001;LY12B05003;LQ13B050001;LY13B020001);浙江省公益性技术应用研究(分析测试)项目(2015C37022)~~

摘　　要：建立了离子色谱-柱切换测定土壤浸出液中氟离子的方法。使用柱切换技术,将样品通过高聚物反相色谱柱进行在线预处理,分离氟离子和小分子有机酸,同时除去水溶性有机杂质,采用收集环收集氟离子并进入分析系统分析,消除了测定氟离子时普遍存在的干扰问题。分析系统的淋洗液为KOH溶液,流速为1.0 mL/min,采用抑制性电导检测,外标法定量。氟离子的线性范围为0.05~10.0 mg/L,相关系数为0.999 9,加标回收率为103.4%~105.3%,相对标准偏差为2.0%~2.1%,检出限（S/N=3）为5.50μg/L。该方法适用于测定复杂基体样品中的氟离子。A new method was proposed for the determination of fluoride in soil water extract by ion chromatography with column-switching technique. A reversed-phase column was used as a pretreatment column on-line to separate fluoride and organic acids as well as to eliminate organics. Fluoride was collected by a collection loop and delivered to the analytical system.Under the optimum conditions,the linear range of the method for fluoride was 0. 05-10. 0 mg/L（r = 0. 999 9）,and the limit of detection（S/ N = 3）was 5. 50 μg/ L. The recovery was in the range of 103. 4%-105. 3% with the relative standard deviation of 2. 0%-2. 1%. The method could be applied to determine fluoride in complicated samples.

关 键 词：离子色谱 柱切换 氟离子 浸出液 土壤 

分 类 号：O658[理学—分析化学]