Use of methyldibenzothiophenes as markers for differentiation and source identification of crude and weathered oils.
Use of methyldibenzothiophenes as markers for differentiation and source identification of crude and weathered oils.
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使用甲基二苯并噻吩作为原油和风化油的区分和来源识别标记。
DOI：
10.1021/es00011a021
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发表时间：
1995
影响因子：
11.4
通讯作者：
M. Fingas
中科院分区：
文献类型：
--
作者：
Z. Wang;M. Fingas
本文介绍了一种利用甲基二苯并噻吩（C1-DBT）同分异构体进行原油和风化油鉴别和来源鉴定的可靠、有效和准确的气相色谱/质谱（GC/MS）方法。该方法是对现有原油表征方法的补充，但也有其独特的优点：（1）C1-DBT异构体在所有被测原油中均以较高的浓度存在，其分布指纹差异显著;（2）C1-DBT在色谱上得到很好的分离和分辨，其它离子的干扰很小，（3）在短期或轻度风化的原油中，C1-DBT的相对分布受蒸发风化的干扰较小。然而，生物降解会改变这一比例。因此，该方法可特异地用于指示油的微生物降解的发生。通过对原油、风化油、燃烧油和生物降解油中C1-DBT相对分布的测定，证明了该方法在油源识别和判别以及原油风化和生物降解研究中的有效性和实用性。
A reliable, effective, and accurate gas chromatographic/mass spectrometric (GC/MS) method for differentiation and source identification of crude and weathered oils by the use of isomeric methyldibenzothiophene (C 1 -DBT) compounds is described. The method complements existing methods useful for oil characterization, but has its own distinct advantages: (1) C 1 -DBT isomers are present in all tested crude oils at relatively high concentrations and their distribution fingerprints vary significantly ; (2) C 1 -DBTs are chromatographicallywell-separated and resolved with minimal interference from other ions, and therefore the ratios of the isomeric C 1 -DBT compounds can be accurately determined ; (3) the relative distributions of C 1 -DBTs are subject to little interference from evaporative weathering in short-term or lightly weathered oils. However, the ratios are altered by biodegradation. Hence, this method can be distinctively used to indicate the occurrence of microbial degradation of oils. The effectiveness and usefulness of this method for oil source identification and differentiation and for oil weathering and biodegradation studies have been demonstrated by determination of the relative distributions of C 1 -DBTs in various samples including crude, weathered, burn, and biodegradation oil samples.