Draft
International Standard
ISO/DIS 7404-5
Coal — Methods for petrographic analysis — Part 5: Method of determining microscopically the reflectance of vitrinite
Reference number
ISO/DIS 7404-5
Edition 4
© ISO 2024
Draft International Standard
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Under development
This Draft International Standard is in the enquiry phase with ISO members.
Will replace ISO 7404-5:2009

ISO/DIS 7404-5

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Abstract

ISO 7404-5:2009 specifies the methods for determining the reflectance of vitrinite of coals microcopically on the polished surfaces, immersed in oil. The methods are applicable to coals from single seams or coal blends covering the whole range of low-, medium- and high-rank coal.

Vitrinite reflectance measurements can be used to characterize the components within blends. Measures can be taken to correct for the vitrinite percentage within each of the components of the blend or to determine the proportion of components in a blend, particularly when the components have dissimilar vitrinite contents. This method necessitates the identification of vitrinite by the analyst.

Reflectance measurements on vitrinite obtained by interpreting the results from an automated system, are outside the scope of ISO 7404-5:2009.

General information

  • Status
     : Under development

    You can help develop this draft international standard by contacting your national member

    Stage
    : DIS ballot initiated: 12 weeks [40.20]
  • Edition
     : 4
    Number of pages
     : 14
  • Technical Committee :
    ISO/TC 27/SC 5
    ICS :
    73.040 
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