色谱Issue(12)：1287-1293,7.DOI:10.3724/SP.J.1123.2015.08031
顶空固相微萃取-气相色谱-质谱联用测定饮用水中的2-甲基异莰醇和土臭素
Determination of 2-methylisoborneol and geosmin in drinking water using headspace solid phase micro-extraction coupled with gas chromatography-mass spectrometry
摘要
Abstract
The odorous compounds of 2-methylisoborneol(2-MIB)and geosmin(GSM)heavi-ly produced and released in water source are one of the most important factors leading to off-flavor emergencies and resident water consumption panic in drinking water. A headspace solid phase micro-extraction ( HS-SPME ) combined with gas chromatography-mass spectrometry ( GC-MS)method was established for the simultaneous determination of these two trace earthy and musty compounds in reservoir water,reservoir soil and tap water. The conditions of HS-SPME,such as salt amount,extraction time and extraction temperature,were optimized based on orthogonal analysis. The qualitative and quantitative analyses of 2-MIB and GSM were carried out in the electron impact( EI)-selective ion scanning mode. The results showed that the linear relationship between peak area and concentration of 2-MIB and GSM was good enough( r 2≥0. 998)from 5 to 1 000 ng/L,the limits of detection were 0. 72 ng/L for 2-MIB,0. 34 ng/L for GSM and the limits of quantification were 2. 40 ng/L for 2-MIB,1. 13 ng/L for GSM. When the target samples spiked in the range of 10-600 ng/L,the average recoveries of the target com-pounds were 93. 6%-107. 7%( RSD≤6. 1%,n=6 ). Based on the above method,the target <br> compounds in reservoir water,reservoir soil and tap water in a certain region of Liaoning Prov-ince were analyzed. The results showed that the two target odors in reservoir water were 3. 0-3. 6 ng/L. As for the extract of the soil around the reservoir,2-MIB was 8. 1 ng/L and GSM was 17. 8 ng/L. The odorous substances were not detected in the tap water. This method is simple, accurate,reliable,highly sensitive and no need of organic solvents. And it is suitable for the detection of 2-MIB and GSM in drinking water.关键词
顶空固相微萃取/气相色谱-质谱/2-甲基异莰醇/土臭素/饮用水/正交分析Key words
headspace solid phase micro-extraction( HS-SPME )/gas chromatography-mass spectrometry ( GC-MS )/2-methylisoborneol ( 2-MIB )/geosmin ( GSM )/drinking water/orthogonal analysis分类
化学化工引用本文复制引用
成建国,刘开颖,白敏冬,程超,余忆玄,周新颖..顶空固相微萃取-气相色谱-质谱联用测定饮用水中的2-甲基异莰醇和土臭素[J].色谱,2015,(12):1287-1293,7.基金项目
国家科技支撑计划项目（2013BAC06B00）；国家高技术研究发展计划（“863”计划）项目（2012AA062609）；辽宁省重点实验室基础研究项目（LZ2015008）；中央高校基本科研业务费专项资金（3132015140）． （）
