Specifies an acid washing test. Gives some indication of the degree of refining but does not give a precise measure of the amount of unsaturated compounds present as different unsaturated compounds produce different colourations with sulphuric acid. Shaking together of equal volumes of the sample and 95 % (m/m) sulphuric acid. Comparison of the colour of the acid layer with that of standard matching solutions.

General information

  • Status :  Withdrawn
    Publication date : 1979-07
  • Edition : 1
    Number of pages : 2
  • :
    ISO/TC 47
  • 71.080.15
    Aromatic hydrocarbons

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