Agriculture Reference
In-Depth Information
Sodium Humate
H
H
O
O
CH
3,
CH
2
4000
3500
3000
2500
2000
1500
1000
Wave numbers (cm)
-1
Toluene/Hexanoic acid/Octanal
Aromatic
-H
Aliphatic
-CH
2
Aliphatic
-CH
2
-CH
3
TMS
Aldehyde
-H
Acid
-H
12
10
8
6
4
2
0
ppm
Figure 8.12.
Infrared spectra of a KBr pellet of 3% sodium humate (Aldrich) and an NMR spec-
trum of a mixture of toluene, hexanoic acid, and octanal. The functionalities responsible for the
absorptions are labeled.
from the pellet (see
C
in Figure 8.7). There are gas cells for obtaining spectra
of gases, and many other methods for obtaining spectra from liquid and solid
samples are available but not as frequently used as these [22-26].
8.12.
NUCLEAR MAGNETIC RESONANCE
Although some useful and interesting data have been obtained by extracting
various components from soil and analyzing them by nuclear magnetic reso-
