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| Simultaneous and Rapid Determination of 102 Acidic，Alkaline and Neutral Organic Pollutants in Groundwater by Gas Chromatography－Mass Spectrometry |
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| DOI： |
| KeyWord:organic pollutants simultaneous determination groundwater pollutant gas chromatography－mass spectrometry |
| Author | Institution |
| ZHANG Jing，RAO Zhu，YANG Zhi-peng，GUO Xiao-chen，LIU Chen，MENG Jian-wei，WANG Li-ping |
1. National Research Center for Geoanalysis，Beijing ，China;
2. Institute of Hydrogeology and Environmental Geology，Chinese Academy of Geological Sciences，Shijiazhuang ，China;
3. Key Laboratory of Ministry of Natural Resources for Eco-geochemistry，Beijing ，China;
4. Hebei Key Laboratory of Mineral Resources and Ecological Environment Monitoring，Baoding ，China |
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| Abstract: |
| A gas chromatography－mass spectrometric（GC－MS） method was developed for simultaneous and rapid determination of 102 kinds of acidic，alkaline and neutral organic pollutants in groundwater，including phenol，aniline，phenyl ether，polychlorinated naphthalene and biphenyl，etc．The simultaneous extraction condition for 102 kinds of acidic，alkaline and neutral organic pollutants in groundwater was optimized. It was confirmed that three-step liquid－liquid extraction method（first in neutral，then in acidic，finally in alkaline condition） could improve the method’s extraction recoveries，accuracy and precision.Under the optimized conditions，the linear ranges of 101 targets except pentachlorophenol were obtained within there respective mass concentration ranges，with correlation coefficients（r）of 0.995 0－0.999 9. The limits of detection were in the range of 1.8－19.7 ng/L. The spiked recoveries for groundwater samples at low，medium and high concentration levels ranged from 47.2% to 126%，43.0% to 117% and 38.8% to 120%，with the relative standard deviations（RSD，n = 7） of 1.1%－27%，2.6%－33% and 2.9%－30%，respectively（expect for pentachlorophenol，diisobutyl phthalate，dibutyl phthalate and bis（2-ethylhexyl）phthalate）．This method was used for the typical investigation on groundwater organic contamination in Shanxi and Henan．24 pollutants were detected，such as phenol，aniline，polycyclic aromatic hydrocarbons and their derivatives．The point detection rate reached 46.7%，which means the water quality presented the characteristics of point source pollution．The method is sensitive，accurate，simple and rapid，which will play an active role in the rapid screening of organic pollutants in groundwater in the future. |
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