Abstract Preview

The principle is based on the conversion of methanol present in a test portion to formaldehyde by oxidation. The oxidation is carried out with a solution of potassium permanganate in phosphoric acid. Reaction of the formaldehyde formed with chromotropic acid (4,5-dihydroxynaphthalene-2,7-disulphonic acid). Photometric measurement of the violet coloration obtained at a wavelength of about 570 nm. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.

General information

  • Status :  Published
    Publication date : 1981-11
  • Edition : 1
    Number of pages : 4
  • :
    ISO/TC 47
  • 71.080.60
    Alcohols. Ethers

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Format Language
  • CHF38

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