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首页> 外文会议>Proceedings of the Twenty-eighth Arctic and Marine Oilspill Program(AMOP) Technical Seminar vol.1 >Characterization, Weathering, and Application of Sesquiterpanes to Source Identification of Spilled Oils
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Characterization, Weathering, and Application of Sesquiterpanes to Source Identification of Spilled Oils

机译：倍半萜的表征，风化及其在溢油来源鉴定中的应用

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摘要

The bicyclic biomarker sesquiterpanes are ubiquitous components of crude oils and ancient sediments. Though biomarker sesquiterpanes have increasing applications in petroleum exploration, there are very few studies on utilization of sesquiterpanes for environmental forensic investigations and oil spill identifications. For lighter petroleum products, refining processes have removed most high-molecular weight biomarkers from the corresponding crude oil feed stocks. Thus, the high boiling point pentacyclic triterpanes and steranes are generally absent in lighter petroleum products jet fuels and most diesels, while the smaller bicyclic sesquiterpanes including drimane and eudesmane get greatly concentrated in these petroleum products. Therefore, examination of GC-MS chromatograms of these bicyclic biomarkers at characteristic fragment ions (m/z 123, 179 193, and 207) can provide a comparable and highly diagnostic means of correlation, differentiation and source identification for lighter petroleum products.rnIn this work, (1) sesquiterpanes in crude oils and petroleum products are identified and characterized; (2) the distributions of sesquiterpanes in different oils, oil distillation fractions and refined products are studied and compared; (3) effects of evaporative weathering on sesquiterpane distributions and concentrations are quantitatively studied; (4) a number of diagnostic index of sesquiterpanes are developed for oil correlation and differentiation. Finally, a practical spill case study is presented to illustrate utility of sesquiterpanes for fingerprinting and identifying unknown lighter petroleum product spills.
机译：双环生物标志物倍半萜是原油和古代沉积物中普遍存在的成分。尽管生物标志物倍半萜在石油勘探中的应用日益广泛，但很少有关于利用倍半萜用于环境法医学调查和溢油识别的研究。对于较轻的石油产品，提炼过程已从相应的原油原料中去除了大多数高分子量生物标志物。因此，在较轻的石油产品喷气燃料和大多数柴油中通常不存在高沸点的五环三萜和甾烷，而较小的双环倍半萜烯（包括drimane和eudesmane）则高度集中在这些石油产品中。因此，检查这些双环生物标志物在特征碎片离子（m / z 123、179 193和207）处的GC-MS色谱图可为轻质石油产品提供相关，区分和来源识别的可比较且高度诊断性的方法。 （1）鉴定和表征原油和石油产品中的倍半萜； （2）研究并比较了倍半萜烯在不同油脂，精馏馏分和精制产品中的分布； （3）定量研究了蒸发风化对倍半子分布和浓度的影响； （4）建立了多种倍半子豆的诊断指标，用于油的相关性和分化。最后，提出了一个实际的泄漏案例研究，以说明五倍子油用于指纹识别和识别未知的较轻石油产品泄漏的效用。

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