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@ARTICLE{Willsch:56428,
      author       = {Willsch, H. and Clegg, H. and Horsfield, B. and Radke, M.
                      and Wilkes, H.},
      title        = {{L}iquid chromatographic separation of sediment, rock and
                      coal extracts and crude oil into compound classes},
      journal      = {Analytical chemistry},
      volume       = {69},
      issn         = {0003-2700},
      address      = {Columbus, Ohio},
      publisher    = {American Chemical Society},
      reportid     = {PreJuSER-56428},
      pages        = {4203 - 4209},
      year         = {1997},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {A method is described for the rapid fractionation of
                      sediment, rock, and coal extracts and crude oils into
                      compound classes. The method is based on combined
                      polarity/affinity chromatography of soluble organic matter.
                      Five heterocompound fractions are obtained in addition to
                      the conventional saturated and aromatic hydrocarbon
                      fractions, Model compound studies show that those fractions
                      are chemically well-defined. The applicability to a variety
                      of geological materials is demonstrated by analyzing a North
                      Sea crude oil and solvent extracts of Posidonia shale, coal,
                      and recent lake sediment samples, Generality
                      reproducibilities and linearities are satisfactory, The
                      total recoveries vary between $76\%$ and $57\%,$ depending
                      on the sample type, The method is shown to be well-suited
                      for the bulk compositional characterization of soluble
                      organic matter. Separations can be performed on both the
                      analytical and the semipreparative scales, Isolated
                      fractions are amenable directly or after derivatization to
                      qualitative and quantitative analysis by gas chromatography
                      and gas chromatography/mass spectrometry.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB793},
      pnm          = {Kohlenwasserstoffgenese und -migration},
      pid          = {G:(DE-Juel1)FUEK421},
      shelfmark    = {Chemistry, Analytical},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:A1997YA44600017},
      doi          = {10.1021/ac9703818},
      url          = {https://juser.fz-juelich.de/record/56428},
}