Формалин технический. Определение содержания формальдегида
Название (англ.):
Formaldehyde solutions for industrial use; Determination of formaldehyde content
Описание (англ.):
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.
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT FORMALDEHYDE SOLUTIONS VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN SOLUBLE MATTER