Biomedical Engineering Reference
In-Depth Information
Table 8.1 (
Continued
)
Major Characteristic Peak Frequencies Reported in the Literature
Reference
Number
Peak
Assignment
FT-IR
Raman
1745 cm
−1
Phospholipids
*
20
Ester group (C= O) vibration of
triglycerides
*
74
ν(C= O), phospholipids (lipid
assignment)
*
20, 33
ν(C= O), phospholipids
*
50
Triglycerides (fatty acids)
*
49
ν(C= O) (polysaccharides, pectin)
*
*
7
The ester group (C= O) vibration
of triglycerides in normal tissues
(can reliably identify fat content
in the tissue C= O stretching
mode of phospholipids)
*
74
*
35
Phospholipids
*
35
1746 cm
−1
C= O stretch (lipid)
*
9
C= O stretch of phospholipids
*
17
ν(C= O) of phospholipids
*
17
1747 cm
−1
C= O, lipids
*
43
1750 cm
−1
C= O (lipid in normal tissues)
*
54
ν(C= C) lipids, fatty acids
*
*
7
The ester group (C= O) vibration
in malignant tissues
*
74
Out-of-phase C= O stretch
*
14
1750/1 cm
−1
1754 cm
−1
C= O (lipid)
*
43
1755 cm
−1
νC= O
*
14
In-phase carbonyl C= O stretch
*
14
1756 cm
−1
One of the absorption positions
for the C= O stretching
vibrations of cortisone
*
102
1762 cm
−1
In-phase carbonyl C= O stretch
*
14
1776/8 cm
−1
In-phase carbonyl C= O stretch
*
14
1997/2040/53/
58 cm
−1
The band of second order
*
48
2095 cm
−1
C-N stretch (one of three
thiocyanate peaks, with 445 and
735 cm
−1
)
*
5
2225 cm
−1
C≡N
*
107
2300-3800 cm
−1
Region of the OH-NH-CH
stretching vibrations
*
48
2343 cm
−1
Asymmetric stretching band of
CO
2
−
hydrates
*
48
2550-80 cm
−1
*
7
ν(S-H) (amino acid methionine)
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