Status : Published (Under review)
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
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Abstract

The method is based on weighing a test portion, dissolution in water, addition of ammonium oxalate solution, diammonium hydrogen phosphate solution and ammonium hydroxide solution, allowing to stand for at least 8 h, filtering out the precipitate through filter paper, transfer of the filter paper with precipitate to a prepared crucible, burning it over a gas burner, incineration of the residue in a furnace, cooling in a desiccator, and reweighing.

General information

  • Status
     : Published
    Publication date
     : 1992-12
    Stage
    : Close of review [90.60]
  • Edition
     : 1
    Number of pages
     : 2
  • Technical Committee :
    ISO/TC 42
    ICS :
    37.040.30 
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