The Use of FTIR-ATR Spectrometry for Evaluation of Surgical Resection Margin in Colorectal Cancer: A Pilot Study of 56 Samples

Table 1

Preliminary assignments of Fourier transform infrared bands in colorectal cancer and mucosa.

Wavenumber/cm^−1	Preliminary assignment
3275	𝜈O--H, 𝜈N--H (water, protein)
2925	𝜈as, CH3 (lipid)
2855	𝜈as, CH2
1740	𝜈C=O (lipid)
1640	Amide I band (protein)
1550	Amide II band (protein)
1460	𝛿C--H (lipid)
1400	𝛿C--H, 𝛿C--O--H (lipid)
1303	𝛿C--H, 𝛿C--O--H, and amide III band
1240	𝛿as, PO2^− (nucleic acid)
1160	𝜈C--O, 𝛿C--O--H, and 𝛿C--O--C (carbohydrate)
1120	𝜈C--O, 𝛿C--O--H, and 𝛿C--O--C (carbohydrate)
1083	𝜈𝑠PO2^− (nucleic acid)