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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
| Fecha edición: |
1981-12-01
En Vigor
|
|---|---|
| Idiomas disponibles: | Francés, Inglés |
| Resumen: | 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. |
| ICS: | 71.080.60 - Alcoholes. Éteres |
| CTN: | ISO/TC 47 - 48858 |
|
Anulaciones Normas |
Anula a ISO/R 1388:1970 |










