This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard volumetric potassium permanganate solution in the presence of sulphuric acid, followed by iodometric determination of the potassium permanganate remaining. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

General information

  • Status :  Withdrawn
    Publication date : 1977-02
  • Edition : 1
    Number of pages : 2
  • :
    ISO/TC 47
  • 71.080.50

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