Physics
Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978gecoa..42..411r&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 42, Issue 4, pp.411-416
Physics
Scientific paper
The IR and 1 H-NMR spectra of fulvic acids (FA) are discussed. The FA, extracted by traditional methods, were fractionated on the basis of molecular weight (m.w.). Three fractions were obtained labelled FA I (m.w. > ~ 2000), FA II (m.w. > ~ 12000) and FA III (~2000 < m.w. < ~ 12000). Fraction FA II was methylated with CH 3 I-Ag 2 O. The 1 H-NMR spectra of unmethylated FA fractions show some signals common to all three fractions and some differences in the 3-5 ppm range due to the resonances of OCH 3 and O-CH 2 groups. The proton spectrum of the methylated fraction shows absorption areas for OCH 3 groups of phenols and carboxyls. The results confirm that NMR spectroscopy is a convenient technique which can contribute to defining the chemical structure of humic substances.
Interesse F. S.
Ruggiero Patrizia
Sciacovelli O.
Testini C.
No associations
LandOfFree
Spectroscopic studies on soil organic fractions--II. IR and 1 H-NMR spectra of methylated and unmethylated fulvic acids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spectroscopic studies on soil organic fractions--II. IR and 1 H-NMR spectra of methylated and unmethylated fulvic acids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopic studies on soil organic fractions--II. IR and 1 H-NMR spectra of methylated and unmethylated fulvic acids will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1379742