Document Detail

Comparative analysis of partial structures of a peat humic and fulvic acid using one- and two-dimensional nuclear magnetic resonance spectroscopy.
MedLine Citation:
PMID:  11931424     Owner:  NLM     Status:  MEDLINE    
Nuclear magnetic resonance (NMR) resonance integrals obtained from one-dimensional NMR spectra provide semiquantitative contents of humic constituents with limited resolution in structural detail. When supplemented by connectivity information available from homo- and heteronuclear two-dimensional NMR spectra a more reliable assignment of humic substructures becomes available. This is demonstrated with a comparative one- and two-dimensional NMR analysis of a fulvic and a humic acid obtained from Eriophorum peat. An example of a detailed analysis of the proton chemical shift region normally attributed to carbohydrates shows substantial contributions from amino acids, amino and desoxy sugars, and highly oxidized aliphatic chains of intermediate length. The very good resolution of structural detail by a combined analysis of all NMR spectra shows that the effect of the fractionation procedure on the composition and chemical structure of humic materials is very significant. The comparison of the partial structures comprising humic acid (HA) and fulvic acid (FA) of the peat humic materials studied indicates that FA is diagenetically downstream of HA, favoring the biopolymer degradation (BD) model of humification.
N Hertkorn; A Permin; I Perminova; D Kovalevskii; M Yudov; V Petrosyan; A Kettrup
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental quality     Volume:  31     ISSN:  0047-2425     ISO Abbreviation:  J. Environ. Qual.     Publication Date:    2002 Mar-Apr
Date Detail:
Created Date:  2002-04-04     Completed Date:  2002-09-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330666     Medline TA:  J Environ Qual     Country:  United States    
Other Details:
Languages:  eng     Pagination:  375-87     Citation Subset:  IM    
GSF-Research Center for Environment and Health, Institute of Ecological Chemistry, Neuherberg, Germany.
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MeSH Terms
Benzopyrans / analysis*
Environmental Monitoring / methods
Humic Substances / analysis*
Magnetic Resonance Spectroscopy / methods*
Reg. No./Substance:
0/Benzopyrans; 0/Humic Substances; 0/Soil; 479-66-3/fulvic acid

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