Codes & Standards - Purchase
ISO 2227:1972
Formaldehyde solutions for industrial use -- Determination of formaldehyde content
SKU: iso_007032_102073
Published by ISO
Publication Year 1972
1 Edition
2 pages
Product Details
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.