Објављен
The specified method is applicable to HCHO contents between 25 5 and 45 %. The field of application may be extended by siutably modifying the mass of the test portion. The principle consists in the reaction of the test solution with a neutral sodium sulphite solution, and acidimetric titration of the liberated sodium hydroxide in presence of thymolphthalein as indicator.
ОБЈАВЉЕН
ISO 2227:1972
90.93
Одлука о потврђивању стандарда
20. 10. 2023.
Rastvori formaldehida za industrijsku upotrebu — Određivanje sadržaja formaldehida
90.93 Одлука о потврђивању стандарда
Formalin, tehnički - Određivanje sadržaja formaldehida - Volumetrijska metoda
95.99 Повучен