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使用HS-SPME-GC-MS在饮用水中使用2-甲基-3,5-二甲基pyrazine作为一种有土有的无气味化合物的定量分析

Youngsang You¹, Boa Jang¹, Woo-Young Joung¹

¹Department of Food Engineering, Dankook University, 119 Dandae-Ro, Dongnam-Gu, Cheonan, Chungcheongnam-Do 31116 Republic of Korea.

Food science and biotechnology

|October 20, 2025

概括

韩国饮用水中土味的气味是由2-甲基-3,5-二甲基二 (2-MDMP) 引起的. 一种经过验证的头空间-固体相微提取-气色谱-质谱法 (HS-SPME-GC-MS) 方法量化了2-MDMP的77.2 ng/mL.

科学领域:

环境化学环境化学
分析化学分析化学
食品科学食品科学食品科学

背景情况:

饮用水中的异味,特别是有土有的气味,可能表明质量差.
最近的报道强调了韩国饮用水中的土味.

研究的目的:

确定饮用水中产生土味的化合物.
开发和验证用于分析这种化合物的定量方法.

主要方法:

同时蒸汽蒸和溶剂提取-气色谱-质谱 (SDE-GC-MS) 和GC-olfactometry (GC-O) 用于化合物识别.
优化和验证头部空间-固体相微提取-气色谱-质谱 (HS-SPME-GC-MS) 的量化.

主要成果:

鉴定出2-甲基-3,5-二甲基pyrazine (2-MDMP) 是致病原体.
优化的HS-SPME-GC-MS方法显示出极好的线性 (R2 = 0.9998),低检测极限 (LOD = 0.83 ng/mL,LOQ = 2.5 ng/mL),以及令人满意的精度和准确性.
在受影响的饮用水中,2-MDMP的度被确定为77.2 ng/mL.

结论:

2-MDMP负责韩国饮用水中的土味.
经过验证的HS-SPME-GC-MS方法可靠地量化饮用水中的2-MDMP.

关键词:

2-甲基-3,5-二甲基pyrazine 的使用情况.饮用水饮用水饮用水没有气味的防臭剂.嗅觉测量是一种嗅觉测量.固相微提取固相微提取方法

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