ISO 2227:1972
$13.00
Formaldehyde solutions for industrial use — Determination of formaldehyde content
| Published By | Publication Date | Number of Pages |
| ISO | 1972-12 | 4 |
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.
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