Analysis of extractable organic compounds in water by gas chromatography mass spectrometry: Applications to surface water
Analysis of extractable organic compounds in water by gas chromatography mass spectrometry: Applications to surface water
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DOI：
10.1016/0039-9140(95)01815-8
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发表时间：
1996-03-01
期刊：
影响因子：
6.1
通讯作者：
Kovacsik, G
中科院分区：
文献类型：
--
作者：
Deroux, JM;Gonzalez, C;Kovacsik, G
水体有机污染物污染是一个常见的环境问题。在一年的时间里，对一个运河网络(法国朗格多克-鲁西隆地区)的地表水进行了分析，以确定有机化合物并监测其质量。在脉冲柱连续逆流液液萃取器中，用二氯甲烷从191个原水中提取污染物。根据美国环境保护局的方法625，在pH高于11的情况下进行提取，并在pH低于2的情况下再次进行提取。采用两种电离技术，即电子电离和化学电离，用气相色谱/质谱仪对提取物进行了分析。通过电子电离获得的质谱图与数据库(NIST)中的结果进行了比较。鉴定出了一些天然化合物和微污染物。通过化学电离(甲烷)确证了它们的结构。在所研究的地表水中，以每升纳克的浓度水平，用这种方法发现了110种物质，构成了可提取化合物的广谱。其中，优先污染物13种。这些特定污染物都是合格的。
Contamination of water by organic pollutants is a common environmental problem. Over a period of 1 year, the surface water of a canal network (Languedoc-Roussillon area, France) was analysed in order to identify organic compounds and to monitor its quality. Pollutants were extracted from 191 of raw water using methylene chloride in a continuous countercurrent liquid-liquid extractor with a pulsed column. The extraction was performed at a pH above 11 and again at a pH below 2 according to U.S. Environmental Protection Agency method 625. The extract was analysed by gas chromatography/mass spectrometry, using two ionization techniques, namely electron ionization and chemical ionization. Mass spectra obtained by electron ionization were compared with those in a database (NIST). Some natural compounds and micropollutants were identified. Their structures were confirmed by chemical ionization (methane). One hundred and ten substances, making up the broad spectrum of extractable compounds in the surface water studied, were found by this method at a nanogram per litre concentration level. Among them, 13 are priority pollutants. These specific pollutants were qualified.