International Standard
ISO 1388-7:1981
Ethanol for industrial use — Methods of test — Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)) — Photometric method
Reference number
ISO 1388-7:1981
Edición 1
1981-11
International Standard
Vista previa
ISO 1388-7:1981
5949
No disponible en español
Publicado (Edición 1, 1981)
Esta norma se revisó y confirmó por última vez en 2023. Por lo tanto, esta versión es la actual.

ISO 1388-7:1981

ISO 1388-7:1981
5949
Idioma
Formato
CHF 42
Convertir Franco suizo (CHF) a tu moneda

Resumen

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.

Informaciones generales

  •  : Publicado
     : 1981-11
    : Norma Internacional confirmada [90.93]
  •  : 1
     : 4
  • ISO/TC 47
    71.080.60 
  • RSS actualizaciones

Ciclo de vida

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)