ISO 1388-3:1981

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Éthanol à usage industriel — Méthodes d’essai — Partie 3: Évaluation de la teneur en composés carbonylés présents en faible quantité — Méthode photométrique

Published By	Publication Date	Number of Pages
ISO	1981-12	8

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Categories: 71.080.60 - Alcohols. Ethers, ISO

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Description

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.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1981-12
Pages Count	8
Language	France
Edition	1
File Size	737.3 KB
ICS Codes	71.080.60 - Alcohols. Ethers

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ISO 1388-3:1981

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