Biomedical Engineering Reference
In-Depth Information
FTIR Spectral Data Acquisition and Analysis
FTIR spectra were obtained using a Nicolet spectrometer in conjunction with
an MTech PAS cell. Good-quality spectra were obtained at 4 cm
−1
resolution
averaging 128 scans. It is deemed necessary to purge the sample with
helium gas in combination with a drying agent by employing magnesium
perchlorate. This ensured that the system was kept completely dry and free
of atmospheric moisture.
The spectra of synthetic and natural apatites provided a number of spec-
tral details indicating some similarities. Spectra of the apatites are given
in Figures 7.7-7.12 and their peak positions are tabulated in Table 7.2. FTIR
2.13
1.78
1.43
1.08
0.73
0.38
0.03
4000
3600
3200
2800 2400
Wavenumber (cm
-1
)
2000
1600
1200
800
400
Figure 7.7
FTIR spectrum of commercial-grade hydroxyapatite Plasma Biotal (P88).
2.13
1.78
1.43
1.08
0.73
0.38
0.03
4000
3600
3200
2800 2400
Wavenumber (cm
-1
)
2000
1600
1200
800
400
Figure 7.8
FTIR spectrum of commercial-grade hydroxyapatite Plasma Biotal (P120).
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