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0.300
0.250
0.200
0.150
0.100
0.050
0.000
8
0.450
0.400
0.350
0.300
0.250
0.200
0.150
0.100
0.050
0.000
8
Figure 13-12. Selecting a Distinguishing Peak of a Compound
Intensity
A second important criterion in selecting a wavelength for analysis is that the absorption
level must be sufficiently intense to be measurable in the concentration range desired.
Figure 13-13 shows two spectra for R-142b at 10 and 120 ppm. Two distinct absorption
Chapter 13 Infrared Spectroscopy Tutorial
9
10
11
Wavelength In Microns
9
10
11
Wavelength In Microns
13-13
Isopropanol
12
13
Methyl Ethyl Ketone
12
13
14
14
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