固相微萃取-气质联用法测定水中痕量土臭素和二甲基异崁醇

摘要

this research, Geosmin (GSM) and 2-Methyliso borneol (2-MIB) have been concentrated and detected with solid-phase microextraction (SPME) and gas chromatography-mass spectrometry (GC/MS). Both of SPME concentration and parameter determination of GC/MS have been optimized to get the best experimental conditions:NaCl dosage 30%,extracted temperature 65 ℃,extracted times 40 min,desorb times 3 min, splitless injection,using SIM data collection,and so on. Moreover, the general knowledge on GSM and 2-MIB in water products and head waters from 28 waterworks, and lake water (which from Qiandenghu Lake and Asian Art Park) have been collected by this method. Those reliable data help to protect headwaters and improve technical water treatment in the future.%采用固相微萃-气相色谱/质谱法(SPME-GC/MS)对GSM和2-MIB进行富集检测。实验对萃取富集和仪器条件进行了优化，得出最佳实验条件：NaCl投加量30%，萃取温度65℃，萃取时间40 min，解吸3 min，不分流进样，SIM模式采集数据。实验还对萃取头的使用次数和维护进行了探讨。利用已经建立的SPME-GC/MS法对佛山市28家水厂的出厂水和原水、佛山典型景观千灯湖和亚艺公园湖水进行普查。该法具有操作简单快速、能实现自动化连续检测、准确、灵敏度高等特点，适用于饮用水中嗅味物质定性和定量。