ISO 1388-3:1981 Preview

Ethanol for industrial use -- Methods of test -- Part 3: Estimation of content of carbonyl compounds present in small amounts -- Photometric method

The method is applicable to products having carbonyl compounds contents between 0.00025 % (m/m) and 0.01 % (m/m). The principle is based on reaction in acid medium of the carbonyl compounds in a test portion with 2,4-dinitrophenylhydrazine. Formation of the corresponding 2,4-dinitrophenylhydrazones which, after making the solution alkaline, take on a red coloration. Photometric measurement of this red coloration at a wavelength of about 445 nm. - International Standards ISO 1388/1 to 1388/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.


General information

  • Current status : Published
    Publication date : 1981-12
  • Edition : 1
    Number of pages : 3
  • :
    ISO/TC 47
    Chemistry
  • 71.080.60
    Alcohols. Ethers

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