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SRPS ISO 1388-7:2014

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

Feb 28, 2014

General information

90.93     Nov 29, 2023

90.20    Oct 15, 2028

ISS

H047

International Standard

71.080.60  

English  

Plan za 2013. godinu.

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS H.B8.236:1988

NOW

PUBLISHED
SRPS ISO 1388-7:2014
90.93 Standard confirmed
Nov 29, 2023

Related project

Adopted from ISO 1388-7:1981