Determination of musty odorants, 2-methylisoborneol and geosmin, in environmental water by headspace solid-phase microextraction and gas chromatography--mass spectrometry.
Determination of musty odorants, 2-methylisoborneol and geosmin, in environmental water by headspace solid-phase microextraction and gas chromatography--mass spectrometry.
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DOI：
10.1016/j.chroma.2007.12.078
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发表时间：
2008-04
期刊：
影响因子：
--
通讯作者：
Keita Saito;K. Okamura;H. Kataoka
中科院分区：
文献类型：
--
作者：
Keita Saito;K. Okamura;H. Kataoka
通过顶空固相微萃取 (HS-SPME) 与气相色谱-质谱联用，开发了一种简单而灵敏的方法，用于测定环境水中的霉味气味物质 2-甲基异龙脑 (MIB) 和土臭味素 (GSM)。使用DB-1毛细管柱在10分钟内分离MIB和GSM，并在选择性离子监测模式下进行检测。使用聚二甲基硅氧烷/二乙烯基苯纤维的 HS-SPME 提供了有效的样品富集，并通过纤维在 70°C 下暴露 30 分钟进行。使用该方法，MIB和GSM的校准曲线在0-500pg/mL范围内呈线性，相关系数在0.9977以上(n=24)。 MIB和GSM的检测限(S/N=3)分别为0.9和0.6pg/mL。该方法成功应用于环境水样的分析，无干扰峰。
A simple and sensitive method for the determination of musty odorants, 2-methylisoborneol (MIB) and geosmin (GSM), in environmental water was developed by headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography–mass spectrometry. MIB and GSM were separated within 10min using a DB-1 capillary column and detected in the selective ion monitoring mode. HS-SPME using a polydimethylsiloxane/divinylbenzene fiber provided effective sample enrichment, and was carried out by fiber exposition at 70°C for 30min. Using this method, the calibration curves of MIB and GSM were linear in the range of 0–500pg/mL, with a correlation coefficient above 0.9977 (n=24). The detection limits (S/N=3) of MIB and GSM were 0.9 and 0.6pg/mL, respectively. This method was successfully applied to the analysis of environmental water samples without interference peaks.