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Aromatic Steroids in Crude Oils and Petroleum Products and Their Applications in Forensic Oil Spill Identification

机译:原油和石油产品中的芳香类固醇及其在法医溢油鉴定中的应用

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摘要

Aromatic steroids including monoaromatic (MAS) and triaromatic steroids (TAS) are a series of naphthenoaromatic hydrocarbons, which consist of mixed structures of aromatic and saturated 6-carbon or 5-carbon rings. Although these aromatic steroids are in relatively low concentration in oils, their specific fingerprints and high weathering resistance make them desirable biomarkers for the characterization, correlation, differentiation, and source identification in environmental forensic investigations of oil spills. This study presents a quantitative GC/MS analysis of these aromatic hydrocarbons in a number of crude oils and refined petroleum products including light and mid-range distillate fuels, heavy fuels, and lubricating oils collected from various sources. TAS-cholestanes (C_(26)), TAS-ergostanes (C_(27)), and TAS-stigmastanes (C_(28)) are the most distinguishable triaromatic steroids in most oil samples. C_(26) TAS-cholestane (20R) and C_(27) TAS-ergostane (20S) are coeluted and often present as the highest peak in m/z 231 chromatograms. A cluster of aromatic steroids were determined in nearly all the studied crude oils at various concentrations. These compounds are generally not detected in light fuel oil like gasoline and light diesel, but at variable abundance in heavy fuels and lubricating oils. In order to better understand the occurrence of aromatic steroids in refined petroleum products, a crude oil was compared with its products of laboratory fluid catalytic cracking (FCC) and hydrotreating processes. The effects of evaporative weathering and biodegradation on these compounds were evaluated with suites of weathered oil samples.
机译:包括单芳族(MAS)和三芳族类固醇(TAS)在内的芳族类固醇是一系列环芳族烃,由芳族和饱和6碳或5碳环的混合结构组成。尽管这些芳香类固醇在油中的浓度相对较低,但它们的特定指纹和高耐候性使其成为溢油环境法证研究中表征,相关,区分和鉴定来源的理想生物标记。这项研究提供了对许多原油和精炼石油产品中的这些芳烃的定量GC / MS分析,包括从各种来源收集的轻,中档馏分燃料,重质燃料和润滑油。 TAS-胆甾烷(C_(26)),TAS-麦角甾烷(C_(27))和TAS-stigmastanes(C_(28))是大多数油样中最可区分的三芳族类固醇。 C_(26)TAS-胆甾烷(20R)和C_(27)TAS-麦角甾烷(20S)共洗脱,通常在m / z 231色谱图中以最高峰出现。在几乎所有研究的原油中,以不同浓度测定了一组芳香族甾族化合物。这些化合物通常在轻质燃料油(如汽油和轻质柴油)中未检出,但在重质燃料和润滑油中却以可变的丰度被检测到。为了更好地了解精炼石油产品中芳香类固醇的存在,将原油与其实验室流化催化裂化(FCC)和加氢处理工艺的产品进行了比较。蒸发风化和生物降解对这些化合物的影响通过一组风化油样品进行评估。

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  • 来源
    《Environmental forensics》 |2013年第4期|278-293|共16页
  • 作者单位

    Emergencies Science and Technology Section, Environment Canada, 335 River Road, Ottawa, ON K1A 0H3, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    SINOPEC Research Institute of Petroleum Processing, Haidian District, Beijing, China;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    Emergencies Science and Technology Section, Environment Canada, Ottawa, ON, Canada;

    SINOPEC Research Institute of Petroleum Processing, Haidian District, Beijing, China;

    SINOPEC Research Institute of Petroleum Processing, Haidian District, Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    triaromatic steroid (TAS); monoaromatic steroid (MAS); refining; oil fingerprinting; forensic; oil spill; weathering; GC/MS;

    机译:三芳族类固醇(TAS);单芳族类固醇(MAS);精制;油指纹图;法医漏油事件;风化;气质联用;

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