ISO 731-3:1977
w
ISO 731-3:1977
4974

Abstract 

The principle consists in a quantitative oxidation of the formic acid in a test portion with excess mercury(II) oxide. Potentiometric titration of the residual acids with standard volumetric sodium hydroxide solution. The method is applicable to products containing 0,5 to 6,0 % (m/m) of other acids, expressed as acetic acid. ISO/R 731 has been subdivised into seven parts. ISO 731/3 replaces clause 4 of ISO Recommendation R 731-1968.


General information 

  •  :  Withdrawn
     : 1977-02
  •  : 1
     : 2
  •  : ISO/TC 47 Chemistry
  •  :
    71.080.40 Organic acids

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