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首页> 外文期刊>Analytical methods >Application of dynamic headspace and gas chromatography coupled to mass spectrometry (DHS-GC-MS) for the determination of oxygenated volatile organic compounds in refinery effluents
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Application of dynamic headspace and gas chromatography coupled to mass spectrometry (DHS-GC-MS) for the determination of oxygenated volatile organic compounds in refinery effluents

机译：动态顶空和气相色谱-质谱联用（DHS-GC-MS）在测定炼油厂废水中的氧化性挥发性有机化合物中的应用

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The paper presents a new procedure for the determination of oxygenated volatile organic compounds (O-VOCs) in postoxidative effluents from the production of petroleum asphalt using dynamic headspace coupled to gas chromatography-mass spectrometry in the selected ion monitoring (SIM) mode (DHS-GC-MS). Among the GC capillary columns tested, a polar SLB-IL111 column with the ionic liquid stationary phase was found to be superior due to its high selectivity for n-alkanes and individual oxygenated volatile organic compounds. The low detection limit, good reproducibility and a wide linear range allows determination of O-VOCs at low concentration levels and applicability of the procedure to routine analyses of O-VOCs in industrial effluents with a very complex composition. The developed procedure was used for the analysis of real samples - raw effluents from the production of bitumens and effluents treated chemically through oxidation. Thirteen compounds at concentrations ranging from 0.01 mu g mL(-1) to 118.61 mu g mL(-1) were identified in the effluents. In addition, nine more compounds, mostly alcohols, aldehydes and ketones, were identified using the SCAN mode. The paper demonstrates the need for monitoring O-VOCs in processes of chemical treatment of effluents. Due to the pathways of oxidation of organic pollutants present in effluents, O-VOCs become secondary pollutants. A substantial increase in the concentration of some groups of compounds, i.e. phenol and its derivatives and aliphatic and cyclic alcohols, was found in oxidized effluents. The presence of these compounds has a negative effect on the activated sludge used in refinery wastewater treatment plants.
机译：本文介绍了一种新方法，该方法使用动态顶空与气相色谱-质谱联用，在选定的离子监测（SIM）模式（DHS- GC-MS）。在测试的GC毛细管色谱柱中，发现具有离子液体固定相的极性SLB-IL111色谱柱由于对正构烷烃和各种含氧挥发性有机化合物的高选择性而具有优越性。低检测限，良好的重现性和宽线性范围允许在低浓度水平下测定O-VOC，并且该方法适用于组成非常复杂的工业废水中O-VOC的常规分析。所开发的程序用于分析真实样品-沥青生产中的原始废水和经过氧化处理的废水。在废水中鉴定出13种化合物，浓度范围为0.01μg mL（-1）至118.61μg mL（-1）。此外，使用SCAN模式还鉴定出另外九种化合物，主要是醇，醛和酮。本文证明了在污水化学处理过程中需要监测O-VOC。由于废水中存在的有机污染物的氧化途径，O-VOC成为次要污染物。在氧化的废水中发现了某些化合物（即苯酚及其衍生物以及脂族和环状醇）的浓度大大增加。这些化合物的存在会对炼油厂废水处理厂中使用的活性污泥产生负面影响。

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