Објављен
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.
ПОВУЧЕН
ISO/R 1388:1970
ОБЈАВЉЕН
ISO 1388-3:1981
90.93
Одлука о потврђивању стандарда
29. 11. 2023.
Etanol za industrijsku upotrebu — Metode ispitivanja — Deo 3: Procena sadržaja malih količina karbonilnih jedinjenja — Spektrofotometrijska metoda
90.93 Одлука о потврђивању стандарда
Etanol za industrijsku upotrebu - Određivanje sadržaja malih količina karbonilnih jedinjenja (kao acetaldehid) - Spektrofotometrijska metoda
95.99 Повучен