柱后衍生离子色谱法在线监控自来水中铝离子含量  

Post-column derivatization ion chromatography for online monitoring of aluminum ion content in tap water

作　　者：肖凯青 吴国权 陈洁 XIAO Kaiqing;WU Guoquan;CHEN Jie(Qiandongnan Kaili Ecological Environment Monitoring Center,Kaili,556000,China;Thermo Fisher Technology(China)Co.,LTD.,Guangzhou,510800,China)

机构地区：[1]贵州省黔东南凯里生态环境监测中心,凯里556000 [2]赛默飞世尔科技(中国)有限公司,广州510800

出　　处：《环境化学》2024年第6期2146-2148,共3页Environmental Chemistry

基　　金：凯里市鱼洞河流域总体向好监测与评价(黔东南科合J字[2021]10号);凯里市臭氧污染成因分析与防治措施研究(黔东南科合J字[2023]07号)资助.

摘　　要：本文建立了连续在线监控自来水中铝离子含量的方法,确立最优色谱条件:以Thermo Scientific Dionex IonPac^(TM) CS10色谱柱作为分析柱,0.75 mol·L^(−1)盐酸溶液为淋洗液(流速1.0 mL·min^(−1)),0.3 mmol·L^(−1)铁钛试剂(Trion)+3 mol·L^(−1)乙酸铵为柱后衍生试剂(流速0.5 mL·min^(−1),柱温30℃);进样体积100μL,柱后衍生管体积750μL,紫外检测器波长310 nm.在最优色谱条件下,10 min即可完成样品分析,标准曲线为Y=9.8232 X+0.5982,相关系数(R)为0.9995,相对标准偏差(RSD)为0.43%(n=10),检出限(LOD)为1.42μg·L^(−1),样品加标回收率在97.0%—103.2%之间.本方法检测自来水中铝离子结果稳定、准确.The study had established a method for continuously online monitoring of aluminum ion content in tap water.The optimal chromatographic conditions were as follows:using Thermo Scientific Dionex IonPacTM CS10 chromatographic column as the analytical column,0.75 mol·L^(−1) hydrochloric acid solution as the eluent,with a flow rate of 1.0 mL·min^(−1),0.3 mmol·L^(−1) iron titanium reagent(Trion)+3 mol·L^(−1) ammonium acetate as the post-column derivatization reagent,with a flow rate of 0.5 mL·min^(−1),column temperature:30℃;injection volume:100μL,post-column derivatization tube volume:750μL,UV detector wavelength:310 nm.Under the optimal chromatographic conditions,sample analysis could be completed in 10 minutes.The standard curve was Y=9.8232X+0.5982,with a correlation coefficient(R)of 0.9995,a relative standard deviation(RSD)of 0.43%(n=10),and a limit of detection(LOD)of 1.42μg·L^(−1).The recovery rate of sample spiking was between 97.0%and 103.2%.The method for detecting aluminum ions in tap water produces stable and accurate results.With the help of the above robust chromatographic conditions and valve switching technology,continuous online monitoring of tap water could be achieved for monitoring aluminum ion content in tap water.

关 键 词：铝离子 离子色谱 在线监控 自来水 

分 类 号：X-1[环境科学与工程] O6[理学—化学]