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ISO 2227:1972 PDF
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Formaldehyde solutions for industrial use — Determination of formaldehyde content
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.
| Edition | 1972 |
|---|---|
| Published Date | 1972 |
| Published By | International Standardization Organisation |
| Page Count | 2 |
