Determination of earthy-musty odors in tap water by gas chromatography-mass spectrometry with silica solid-phase extraction

文献类型： 外文期刊

第一作者： Tian, Liangliang

作者： Tian, Liangliang;Huang, Dongmei;Shi, Yongfu;Kong, Cong;Wang, Yuan;Tian, Liangliang;Shi, Yongfu;Wang, Yuan;Qu, Xin;Huang, Dongmei;Kong, Cong

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关键词： n-Hexane; Silica; Earthy-musty; Tap water; Gas chromatography-mass spectrometry (GC-MS)

期刊名称：HELIYON （ 影响因子：4.0； 五年影响因子：4.1 ）

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年卷期： 2023 年 9 卷 11 期

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收录情况： SCI

摘要： This research aimed to develop an effective method for detecting semivolatile earthy-musty odors without using the conventional sample processing equipment used for volatile compounds. The concurrent isolation of 2-methylisoborneol (2-MIB), trans-1,10-dimethyl-trans-9-decalol (geo-smin, GSM), 2-isopropyl-3-methoxy pyrazine (IPMP), and 2-isobutyl-3-methoxy pyrazine (IBMP) in tap water was successfully achieved by employing a combination of n-hexane liquid-liquid extraction (LLE) and silica solid-phase extraction (SPE) techniques. Gas chromatography-mass spectrometry (GC-MS) was utilized for the identification of these targets, with the inclusion of borneol (BN) as an internal reference. This robust method was optimized and validated. It was found that the method showed good linearity in the range of 0.5-100 ng/mL and produced good recoveries (84.6 %-103 %) with satisfactory relative standard deviations (1.50 %-10.1 %). The determined limits of detection (LODs) for the group of four substances were found to vary from 0.3 to 0.9 ng/L, whereas the limits of quantitation (LOQs) exhibited variations between 1 and 3 ng/L. The subsequent implementation of this methodology to evaluate the four previously described off-flavor chemicals in tap water resulted in satisfactory results.

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