Abstract 

The principle is based on the measurement of the colour of a test portion, by the method specified in ISO 2211, after a specified heat treatment. The test sample is maintained in a colorimetric tube in an electrically heated aluminium block, controlled at (250 3) °C for 90 min, in the molten state. The results are expressed in Hazen units. - 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  • Status :  Withdrawn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
    Chemistry
  • 71.080.50
    Anhydrides

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