水中2-甲基异莰醇等3种致嗅物质的顶空固相微萃取-气相色谱-质谱测定法  

Determination of Odorant Component 2-Methylisobomeol Geosmin and Dimethyl Trisulfide in Water by Headspace Solid-phase Microextraction-GC-MS

作　　者：张振伟[1] 应波[1] 鄂学礼[1] 

机构地区：[1]中国疾病预防控制中心环境与健康相关产品安全所,北京100050

出　　处：《环境与健康杂志》2012年第5期453-455,共3页Journal of Environment and Health

基　　金：水体污染控制与治理科技重大专项(2009ZX07419-002)

摘　　要：目的建立水体中2-甲基异莰醇、土臭素和二甲基三硫醚3种致嗅物质的测定方法。方法采用顶空固相微萃取-气相色谱-质谱法进行测定,研究并探讨萃取纤维类型、盐浓度、萃取温度、萃取时间、解吸温度和解吸时间等因素对致嗅物质萃取量的影响,选定了最佳分析条件。结果上述3种致嗅物质的线性范围分别为5.0～1 000、5.0～1 000和10～1 000 ng/L;该方法的检出限分别为1.1、0.7、1.6 ng/L,定量下限为3.8、2.2、5.3 ng/L;回收率为80.2%～96.9%,RSD为3.3%～7.1%。结论该方法具有无需有机溶剂、所需样品量较少、操作简单、快速的优点,检测的灵敏度较高,适用于水体中这3种致嗅物质的定量分析。Objective To establish a method for the determination of odorant component 2-methylisobomeol,geosmin and dimethyl trisulfide in water. Methods 2-methylisobomeol,geosmin and dimethyl trisulfide were determined by headspace solid-phase microextraction with gas chromatography-mass spectrometry analysis. The optimum operating conditions such as fiber type, salt concentration, water temperature, extraction time, desorption temperature and time were studied. Results The calibration linear range of above-mentioned three odorant components were 5.0-1 000, 5.0-1 000 and 10-1 000 ng/L. The limits of detection were 1.1, 0.7 and 1.6 ng/L and the limits of quantification were 3.8, 2.2 and 5.3 ng/L respectively. The relative standard deviations were 3.3%-7.1% and the average rates of recovery were 80.2%-96.9%. Conclusion For its rapid and simple operation, solvent-free and little sample, the method established in the paper is applicable to the determination of trace odorant component 2-methylisobomeot,geosmin and dimethyl trisulfide in water.

关 键 词：水 致嗅物质 顶空固相微萃取 气相色谱-质谱 

分 类 号：O657.7[理学—分析化学]