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Table 2 Proton NMR peak area integrations at the given ppm ranges, for each sample

From: Characterization of terrestrial dissolved organic matter fractionated by pH and polarity and their biological effects on plant growth

Sample CH x Total aliphatic #C-OH/ C-NH O-CH/ N-CH Total oxygenated C = C-H *Ar-H *Total aromatic O = C-H
  0.5-1.8 0.5-1.8 2.0-3.3 3.4-5 2-5 5-7 7-9 5-9 9-10
Whole 43.0 43.0 30.4 7.0 37.4 5.5 12.3 17.8 1.8
Acid insoluble 38.9 38.9 28.0 6.8 34.8 7.1 16.7 23.8 2.5
Acid soluble 38.7 38.7 36.5 7.6 44.1 4.9 11.2 16.1 1.1
C18 Fil:Ret 100:0 30.4 30.4 42.3 8.5 50.8 6.3 11.3 17.6 1.2
C18 Fil:Ret 75:25 33.5 33.5 38.8 7.3 46.1 6.0 13.2 19.2 1.2
C18 Fil:Ret 50:50 36.2 36.2 34.5 7.1 41.6 6.4 14.6 21.0 1.2
C18 Fil:Ret 25:75 40.2 40.2 32.3 5.2 37.5 6.2 15.0 21.2 1.1
C18 Fil:Ret 0:100 41.2 41.2 30.3 5.3 35.6 6.3 15.9 22.2 1.0
  1. #integration region excludes the peak area for acetate/acetic acid.
  2. *integration region excludes the peak area for formate/formic acid.
  3. Values given in bold are for the summed total peak areas in the aliphatic, oxygenated, and aromatic regions.
  4. The 1H NMR spectra are shown in Figure 3.