Accession Number:

AD0442327

Title:

AN EXAMINATION OF THE HUMIC ACIDS OF SPHAGNUM PEAT,

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH COUNCIL OF CANADA HALIFAX (NOVA SCOTIA) ATLANTIC REGIONAL LAB

Personal Author(s):

Report Date:

1963-03-25

Pagination or Media Count:

12.0

Abstract:

Humic acid fractions were prepared by the repeated extraction of Sphagman peat with dilute sodium hydroxide. The infrared spectra of the initial fractions were typical of humic acids. Spectra of the later fractions were indicative of an aromatic structure similar to that of lignin. The content of methoxyl groups, which had remained constant through the earlier fractions, increased rapidly in the later fractions. Changes in the intrinsic viscosity of the fractions in aqueous aldali and salt solutions paralleled those observed in the infrared spectra and methoxyl group content. The results show that humic acids of similar composition and increasing molecular weight were extracted initially, and that low molecular weight material resembling lignin was confirmed by alkaline nitrobenzene oxidation of a peat residue. Dilute sodium pyrophosphate extracted humic acids which were similar in all respects to the first fraction obtained by extraction with dilute sodium by hydroxide. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE