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| Determination of Iodo-trihalomethane in Drinking Water by Gas Chromatography |
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| DOI： |
| KeyWord:liquid-liquid extraction gas chromatography-electron capture detector(GC-ECD) iodo-trihalomethane drinking water |
| Author | Institution |
| LI Zhen-lin,ZHAO Fang,MA Ya-hong,QIN Tai-sheng,DONG Hui-yu,LIU Shao-gang*,TAN Xue-cai,DIAO Kai-sheng |
1.广西民族大学化学化工学院广西高校食品安全与药物分析化学重点实验室;2.中国科学院生态环境研究中心中国科学院饮用水科学与技术重点实验室 |
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| Abstract: |
| Two analytical methods for the detection of iodinated trihalomethanes(I-THMs) in drinking water by purge and trap(P&T) with gas chromatography-mass spectrometry(GC-MS) and liquid-liquid extraction with gas chromatography-electron capture detection(LLE-GC/ECD) were compared.The results showed that the LLE-GC/ECD method using methyl tert-butyl ether(MTBE) as extractant was more suitable for the qualitative and quantitative analysis of I-THMs.The linearity was observed in the range of 0.5-1 000 μg/L for 6 I-THMs quantified by internal standard,with correlation coefficients(r2) more than 0.99.The developed LLE-GC/ECD method showed a good repeatability with relative standard deviations(RSD,n=7)of 3.9%-6.4%.The limits of detection(LODs) were between 0.05 μg/L and 0.11 μg/L.Recoveries of I-THMs in surface water filtered source water,and tap water at spiked levels of 0.5,2.0,10.0 μg/L were in the range of 81.2%-108.6%,with RSDs of 2.6%-7.7%.The method was simple,rapid and sensitive,and could be well suited for the determination of I-THMs in drinking water. |
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