...
首页> 外文期刊>Environmental Science & Technology >Comprehensive Chemical Characterization of Hydrocarbons in NIST Standard Reference Material 2779 Gulf of Mexico Crude Oil
【24h】

Comprehensive Chemical Characterization of Hydrocarbons in NIST Standard Reference Material 2779 Gulf of Mexico Crude Oil

机译:NIST标准参考材料2779中的碳氢化合物的综合化学特性墨西哥湾原油

获取原文
获取原文并翻译 | 示例
           

摘要

Comprehensive chemical information is needed to understand the environmental fate and impact of hydrocarbons released during oil spills. However, chemical information remains incomplete because of the limitations of current analytical techniques and the inherent chemical complexity of crude oils. In this work, gas chromatography (GC)-amenable C_9-C_(33) hydrocarbons were comprehensively characterized from the National Institute of Standards and Technology Standard Reference Material (NIST SRM) 2779 Gulf of Mexico crude oil by GC coupled to vacuum ultraviolet photoionization mass spectrometry (GC/VUV-MS), with a mass balance of 68 ± 22%. This technique overcomes one important limitation faced by traditional GC and even comprehensive 2D gas chromatography (GC×GC): the necessity for individual compounds to be chromatographically resolved from one another in order to be characterized. VUV photoionization minimizes fragmentation of the molecular ions, facilitating the characterization of the observed hydrocarbons as a function of molecular weight (carbon number, N_C), structure (number of double bond equivalents, N_(DBE)), and mass fraction (mg kg~(-1)), which represent important metrics for understanding their fate and environmental impacts. Linear alkanes (8 ± 1%), branched alkanes (11 ± 2%), and cycloalkanes (37 ± 1296) dominated the mass with the largest contribution from cycloalkanes containing one or two rings and one or more alkyl side chains (27 ± 9%). Linearity and good agreement with previous work for a subset of > 100 components and for the sum of compound classes provided confidence in our measurements and represents the first independent assessment of our analytical approach and calibration methodology. Another crude oil collected from the Marlin platform (35 km northeast of the Macondo well) was shown to be chemically identical within experimental errors to NIST SRM 2779, demonstrating that Marlin crude is an appropriate surrogate oil for researchers conducting laboratory research into impacts of the DeepWater Horizon disaster.
机译:需要全面的化学信息来了解环境命运以及漏油期间释放的碳氢化合物的影响。但是,由于当前分析技术的局限性以及原油固有的化学复杂性,化学信息仍然不完整。在这项工作中,通过气相色谱与真空紫外光电离质谱联用,从美国国家标准技术研究院标准参考材料(NIST SRM)2779墨西哥湾原油中全面表征了适用于气相色谱(GC)的C_9-C_(33)碳氢化合物。质谱(GC / VUV-MS),质量平衡为68±22%。该技术克服了传统GC甚至全面的2D气相色谱(GC×GC)所面临的一个重要限制:必须对各个化合物进行色谱分离以进行表征。 VUV光电离可最大程度地减少分子离子的碎裂,有助于根据分子量(碳原子数,N_C),结构(双键当量数,N_(DBE))和质量分数(mg kg〜 (-1)),代表了解其命运和环境影响的重要指标。线性烷烃(8±1%),支链烷烃(11±2%)和环烷烃(37±1296)占主导地位,其中含有一个或两个环和一个或多个烷基侧链的环烷烃的贡献最大(27±9) %)。线性和与先前工作的高度一致(对于100多个子集)以及化合物类别的总和为我们的测量提供了信心,并代表了对我们的分析方法和校准方法的首次独立评估。从马林平台(Macondo井东北35公里)处收集的另一种原油在实验误差范围内显示出与NIST SRM 2779具有相同的化学性质,这表明马林原油是研究人员对DeepWater的影响进行实验室研究的合适替代油。地平线灾难。

著录项

  • 来源
    《Environmental Science & Technology》 |2015年第22期|13130-13138|共9页
  • 作者单位

    Department of Environmental Science, Policy and Management University of California, Berkeley, California 94720, United States,Aerosol Dynamics, Inc., Berkeley, California 94710, United States ,National Physical Laboratory, Hampton Road, Teddington, Middlesex, TW11 0LW, United Kingdom;

    Department of Environmental Science, Policy and Management University of California, Berkeley, California 94720, United States;

    Department of Environmental Science, Policy and Management University of California, Berkeley, California 94720, United States,Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States;

    Department of Environmental Science, Policy and Management University of California, Berkeley, California 94720, United States,Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario MSS 3ES, Canada;

    Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

    Department of Environmental Science, Policy and Management University of California, Berkeley, California 94720, United States,Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号