ISO 1388-3:1981

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

Publication date:   Dec 1, 1981

General information

90.93 Standard confirmed   Mar 15, 2018

ISO

ISO/TC 47 Chemistry

International Standard

71.080.60   Alcohols. Ethers

Buying

Published

Language in which you want to receive the document.

Scope

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.

Life cycle

PREVIOUSLY

Revises
ISO/R 1388:1970

NOW

PUBLISHED
ISO 1388-3:1981
90.93 Standard confirmed
Mar 15, 2018