纤维管内固相微萃取-原子荧光光度法测定水中痕量As(Ⅴ)  

The determination of trace amount of As(Ⅴ) in aqueous solution by fiber-in-tube preconcentration combined with atomic fluorescence spectroscopy

作　　者：孔志云[1,2] 吴晓青[1,3] 张环[1,2] 陈远[1,3] 魏俊富[1,2] 张晓琪[1,2] KONG Zhi-yun;WU Xiao-qing;ZHANG Huan;CHEN Yuan;WEI Jun-fu;ZHANG Xiao-qi(State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387;School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387;School of Textile Engineering Tianjin Polytechnic University, Tianjin 300387)

机构地区：[1]省部共建分离膜与膜过程国家重点实验室(天津工业大学),天津300387 [2]天津工业大学环境与化学工程学院,天津300387 [3]天津工业大学纺织工程学院,天津300387

出　　处：《分析试验室》2018年第6期638-641,共4页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(51678409;51708406);天津市科技支撑计划(15ZCZDSF00880);天津市科技计划项目(15PTSYJC00240;天津市自然科学基金(17JCQNJC08700)资助

摘　　要：用聚丙烯纤维作为基体,利用高能电子辐照接枝制备了叔铵化纤维,并采用溴代乙烷季铵化得到季铵型离子交换纤维。将制备的季铵型离子交换纤维用于纤维固相微萃取方法中的吸附剂,与原子荧光光度法相结合,建立了一种简单、快速的测定溶液中痕量As(Ⅴ)的方法。研究了溶液pH、流速、溶液浓度对吸附的影响,并对洗脱剂的种类、洗脱剂的流速和体积进行了优化。在最佳反应条件下,As(Ⅴ)的定量限为0.1μg/L,富集因子为50,相对标准偏差为4.5%(n=6)。该方法可测定复杂基质中痕量As(Ⅴ)。The quaternary ammonium fibers were prepared by radiation-induced grafting of 2-（dimethylamino） ethyl methacrylate（DMAEMA） onto polypropylene（PP） fibers（PP-gDMAEMA） and modifying with bromoethane.A simple and rapid method was developed for the determination of As（Ⅴ） by atomic fluorescence spectrophotometercombined with fiber-in-tube solidphase microextraction in which the quaternary ammonium fibers acted as the adsorbent.The main factors influencing the preconcentration and extraction of As（Ⅴ）,p H of the aqueous solution,sample flow rate,eluent concentration,eluent volume,and eluent flow rate were investigated.The results indicated that under the optimized conditions,the preliminary was 50 times and the relative standard deviations were 4.5%（n = 6） with the limit of quantification of 0.1μg/L.The proposed method had the advantages of convenience,high sensitivity and accuracy for use in detection of As（Ⅴ） in complex matrices.

关 键 词：季铵型离子交换纤维 As(Ⅴ) 固相微萃取 原子荧光光度法 吸附 

分 类 号：X832[环境科学与工程—环境工程] O657.31[理学—分析化学]