吹扫捕集–气相色谱质谱联用仪测定水中2-甲基异莰醇和土臭素

Determination of 2-Methylisoborneol and Geosmin in Water by Blow Sweep Capture Gas Chromatography-Mass Spectrometry

摘要: 本文建立一种利用吹扫捕集–气相色谱质谱联用(T&P-GC-MS)技术检测水中痕量2-甲基异莰醇(2-MIB)和土臭素(GSM)的分析方法。结果显示：吹扫捕集–气相色谱质谱联用仪测定水中2-甲基异莰醇和土臭素线性大于等于0.995。吹扫捕集–气相色谱质谱联用仪对于2-甲基异莰醇检出限是1.3 ng/L，土臭素检出限是3.8 ng/L。利用本实验建立的方法对生活饮用水和水源地水进行加标回收实验，结果表明2-甲基异莰醇回收率在102%~117%；土臭素回收率在84%~98%，二者回收率良好，满足日常检测需求。

Abstract: In this paper, an analytical method for the detection of trace amounts of 2-methylisopodol (2-MIB) and geosmine (GSM) in water was established by purge and trap-gas chromatography-mass spectrometry (T&P-GC-MS) technology. The results showed that the linear determination of 2-methylisoborneol and geosmin in water using a blowdown capture gas chromatography-mass spectrometer was greater than or equal to 0.995. The detection limit of 2-methylisoborneol and geosmin by blow sweep capture gas chromatography-mass spectrometry is 1.3 ng/L and 3.8 ng/L, respectively. The method established in this experiment was used to conduct spiked recovery experiments on drinking water and water sources, and the results showed that the recovery rate of 2-methylisoborneol was between 102% and 117%; The recovery rate of geosmin is between 84% and 98%, with good recovery rates for both, meeting daily testing needs.