气相动态顶空进样同时分析饮用水源水中17种有机物  

Simultaneous Determination of 17 Organic Compounds in Drinking Source Water by Dynamic Headspace Sampling Method Coupled to Gas Chromatography-Mass Spectrometry

作　　者：赖永忠 王一刚 

机构地区：[1]汕头市环境保护监测站,广东汕头515041

出　　处：《中国给水排水》2013年第14期94-98,共5页China Water & Wastewater

摘　　要：建立了对饮用水源水中乙醛、丙烯醛、丙烯腈、环氧氯丙烷、硝基苯、硝基氯苯、氯苯、二氯苯、三氯苯和四氯苯进行同时分析的气相动态顶空进样-气相色谱-质谱法（D—HS—GC—MS），目标物均为集中式生活饮用水地表水源地特定项目。经过对比试验，确定了优化后的气相动态顶空进样法主要参数：样品盐度为35％、平衡温度为50℃、平衡时间为10min、吹脱捕集气流速为60mlMmin、吹脱捕集时间为15min。利用优化后的方法参数对乙醛等17种有机物进行分析，环氧氯丙烷和丙烯腈的方法检出限分别为7和19μg／L，乙醛、丙烯醛、硝基苯和硝基氯苯的方法检出限介于0．7～1．5μg／L，氯苯类化合物的检出限则为0．003～0．015μg/L。使用气相动态顶空进样法对饮用水源水实际样品进行监测，加标回收率均值介于78．7％～128％，对应的RSD为2．8％～23．0％（n=5）。Dynamic headspace sampling method coupled to gas chromatography-mass spectrometry （D-HS-GC-MS） was established to determine acetaldehyde, aerolein, acrylonitrile, epiehlorohydrin, ni- trobenzene, nitroehlorobenzene, chlorobenzene, dichlorobenzene, trichlorobenzene and tetraehloro- benzene in drinking source water. The targets were the special items for centralized drinking source wa- ter. Some parameters of dynamic headspaee sampling method, such as the sample salinity （35%） , equi- librium temperature （50 ℃ ） , equilibrium time （10 min） , purge-and-trap gas flow （60 mL/min） and purge-and-trap time （15 min） were optimized. The detection limits were 7 and 19 μg/L for epichloro- hydrin and acrylonitrile, 0.7 μg/L to 1.5 μg/L for acetaldehyde, acrolein, nitrobenzene and nitrochlo- robenzene and 0.003 μg/L to 0. 015 μg/L for chlorobenzene compounds. The dynamic headspace sam- piing method was used to monitor organic compounds in drinking source water with recoveries of 78.7% to 128% and RSD of 2. 8% to 23.0% （n=5）.

关 键 词：气相动态顶空进样法 饮用水源水 有机物 

分 类 号：X832[环境科学与工程—环境工程]