Reference number
ISO 1388-8:1981
ISO 1388-8:1981
© ISO 2024
International Standard
ISO 1388-8:1981
Ethanol for industrial use — Methods of test — Part 8: Determination of methanol content (methanol contents between 0,10 and 1,50 % (V/V)) — Visual colorimetric method
Edition 1
1981-11
1981-11
ISO 1388-8:1981
5950
Publicado
(Edición 1, 1981)
Esta publicación se revisó y confirmó por última vez en 2023.
Por lo tanto, esta versión es la actual.
Resumen
The principle is based on the conversion of the methanol present in a test portion to formaldehyde by oxidation with a solution of potassium permanganate in phosphoric acid. Reaction of the formaldehyde formed with Schiff reagent. Visual comparison of the colour obtained with the colours of standard colorimetric solutions containing known quantities of formaldehyde. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.
Ciclo de vida
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Anteriormente
RetiradaISO/R 1388:1970
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Ahora