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
- Standard No.
- ISO 1388-3:1981
- Release Date
- 1981
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 1388-3:1981
- 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.
ISO 1388-3:1981 history
- 1981 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
