Reference number
ISO 1389-7:1977
ISO 1389-7:1977
Phthalic anhydride for industrial use — Methods of test — Part 7: Determination of maleic anhydride content — Polarographic method
Edition 1
1977-02
Withdrawn
ISO 1389-7:1977
5961
Withdrawn (Edition 1, 1977)

Abstract

The principle consists in the dissolution of a test portion in acetone, removal of 1,4-naphthoquinone present in the solution by extraction with benzene. Polarographic measurement of the aqueous solution and determination of the mass of maleic anhydride by means of the calibration graph. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

General information

  •  : Withdrawn
     : 1977-02
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 3
  • ISO/TC 47
    71.080.50 
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