Abstract
2-甲基异崁醇（2-MIB）、土臭素（GSM）、2,4,6-三氯苯甲醚（TCA）、β-环柠檬醛（β-Cyclocitral）、β-紫罗兰酮（β-Ionone）和二甲基三硫醚（DMTS）为不同特征水体的典型嗅味物质.本研究建立了大体积浓缩-固相微萃取-气相色谱-质谱联用同时测定这6种痕量物质的方法.自制大体积玻璃萃取瓶,萃取体积为100 mL.优化的萃取条件：萃取时间30 min,NaC1离子浓度0.3 g/mL,萃取温度65℃,解吸时间2 min,溶液pH值4～9范围内,不影响萃取效果.各物质的检出限均低于1 ng/L,具有较高的灵敏度；加标回收率为86.0％～114.2％,具有较好的精密度；浓度在1～200 ng/L范围内线性关系良好.本方法应用于江河湖泊、水库、自来水出厂水和管网末端水等水体中嗅味物质的定量检测,结果表明：在富营养化的水体中DMTS,2-MIB和β-Cyclocitral的浓度较高；TCA在管网末端水中含量较高.
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