The Determination of the Water Content of the Low Polymers of Formaldehyde by the Karl Fischer Method. I. The Determination of the Adsorbed Water and Bound Water Formed by the Pyrolysis of the Polymer

Autor:	Kaname Muroi, Kunihiko Ogawa
Rok vydání:	1963
Předmět:	chemistry.chemical_compound Chromatography chemistry Reagent Inorganic chemistry Formaldehyde Bound water Titration General Chemistry Methanol Water content Pyrolysis Karl Fischer titration
Zdroj:	Bulletin of the Chemical Society of Japan. 36:965-969
ISSN:	1348-0634 0009-2673
Popis:	The adsorbed water of the low polymer of formaldehyde was determined by extraction with dry methanol and Karl Fischer titration. The sum of the adsorbed water and the water formed by the pyrolysis of the sample was determined by titration with the specially prepared Karl Fischer reagent SS, after the sample had been dissolved in propylene glycol by heating. The method of the separation and the determination of the two kinds of water was thus established. When the average numerical degree of polymerization of the polymers was calculated from the content of bound water determined by this method, satisfactory results were obtained. To verify the accuracy of the determination of water content, formaldehyde and methanol were determined independently; their sum was found to be almost 100%.
Databáze:	OpenAIRE
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