气相色谱法检测三卤甲烷过程中硫酸钠用量的研究  

Na2SO4 dosage in determination of trihalomethanes by GC

作　　者：蒋复阳[1,2,3,4] 王敦球 解跃峰[4] JIANG Fu-yang;WANG Dun-qiu;XIE Yue-feng(College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541006,China;Guangxi Key Laboratory of Environment Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541006,China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin 541006,China;School of Science,Engineering,and Technology,Pennsylvania State University,Middletown,PA,17057,USA)

机构地区：[1]桂林理工大学环境科学与工程学院 [2]桂林理工大学广西环境污染控制理论与技术重点实验室 [3]岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541006 [4]School of Science,Engineering,and Technology,Pennsylvania State University,Middletown,PA,17057,USA

出　　处：《桂林理工大学学报》2019年第4期949-953,共5页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51638006);广西高校中青年教师科研基础能力提升项目(2017KY0269)

摘　　要：通过理论计算和水样检测对三卤甲烷检测过程中液液萃取时无水硫酸钠用量优化进行了研究。结果显示:对于模拟样品(在去离子水中加入20μg/L三卤甲烷标准溶液)和实际水样(校园龙头水和泳池水),萃取过程中加入硫酸钠的用量在6~16 g时,萃取效率相差不大;pH和三卤甲烷浓度对萃取效果影响较小;三卤甲烷的方法检测限达到3~130 ng/L;使用6 g硫酸钠强化液液萃取的效果与使用12 g硫酸钠(美国环保署推荐的EPA 551.1检测方法)强化的效果近似。In this study,the optimization of sodium sulfate dosage in liquid-liquid extraction process of trihalomethane(THMs)detection was investigated through theoretical calculation and water sample detection.For simulated samples(added 20μg/L THMs standard solution into distilled water)and real samples(tap water and swimming pool water of campus),dose of Na2SO4 from 6 g to 16 g shew similar efficiencies on THMs extraction based on salting-out.The method determination limit of THMs ranges from 3 ng/L to 130 ng/L.Compared with the recommended dose 12 g in EPA 551.1,dose of 6 g shows similar efficiency,with low-cost,easywashing vials and less potential hazardousness to environment.

关 键 词：无水硫酸钠用量 盐析效应 萃取效率 三卤甲烷 

分 类 号：O661.1[理学—分析化学] X132[理学—化学]