固相萃取-气相色谱质谱法测定水中土霉味物质的试验研究OACHSSCD
Experimental Study on the Determination of Earthy-Musty Odorants in Water by Solid Phase Extraction-Gas Chromatography and Mass Spectrometry
土霉味是我国最常见的饮用水嗅味类型,土臭素(Geosmin,GSM)和2-甲基异莰醇(2-Methylisoborneol,2-MIB)是导致土霉味的主要物质.试验采用固相萃取-气相色谱质谱法测定水中土霉味物质GSM和2-MIB,通过对萃取小柱、洗脱溶剂、洗脱体积和萃取速率等关键参数进行优化,确定最佳萃取条件.萃取液经色谱柱分离,在选择离子监测模式下采用内标法定量.结果显示,浓度为 2.5～100.0 μg/L时,GSM和 2-MIB的峰面积与质量浓度线性关系良好(相关系数r＞0.999),方法检出限分别为 0.50 ng/L、0.66 ng/L,加标回收率为91.1%～95.7%,该方法适用于饮用水水源和藻类暴发水体中GSM和2-MIB的测定.
Earthy-musty odor is the most common type of odor in drinking water in China,with Geosmin(GSM)and 2-Methylisoborneol(2-MIB)being the main substances causing the odor.The experiment uses solid phase extraction-gas chromatography and mass spectrometry to determine the earthy-musty odorants GSM and 2-MIB in water,and determines the optimal extraction conditions by optimizing key parameters such as extraction column,elution solvent,elution volume,and extraction rate.The extraction liquid is separated by a chromatographic column and quantified by using internal standard method under the selected ion monitoring mode.The results show that when the concentration is between 2.5～100.0 μg/L,the peak areas of GSM and 2-MIB have a good linear relationship with mass concentration(correlation coefficient r＞0.999),the detection limits of the method are 0.50 ng/L and 0.66 ng/L,respectively,and the spiked recovery rate is 91.1%～95.7%,this method is suitable for the determination of GSM and 2-MIB in drinking water sources and algae outbreak water bodies.
茹赛红;张昆;蒋艳萍;吴斌斌;罗瑶;吴银菊
湖南省长沙生态环境监测中心,长沙 410000
化学
固相萃取气相色谱质谱法土霉味物质土臭素(GSM)2-甲基异茨醇(2-MIB)
solid phase extractiongas chromatography and mass spectrometryearthy-musty odorantsGeosmin(GSM)2-Methylisoborneol(2-MIB)
《中国资源综合利用》 2024 (006)
39-42 / 4
湘江长沙段干流及支流(浏阳河)水生态环境监测调查.
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