Skip to main content
. 2023 Sep 24;9(10):e20413. doi: 10.1016/j.heliyon.2023.e20413

Table 3.

Cooking oil samples at specific wavenumbers of bands on FTIR spectra in mid-infrared region, along with assigned functional group and modes of vibration.

Wavenumbers (cm−1) Functional groups Peak assignment
720 ‒(CH2)n‒ Bending (rocking)
1100 ‒C‒O Stretching
1160 ‒C‒O‒CH2‒ Stretching (bending)
1239 ‒C‒O‒CH2‒ Stretching (bending)
1379 ‒C‒H (‒CH3) Bending (symmetrical)
1466 ‒C‒H (‒CH2, CH3) Bending (scissoring)
1745 ‒C Created by potrace 1.16, written by Peter Selinger 2001-2019 O (ester group) Stretching
2853 ‒C‒H (CH2) Stretching (symmetrical)
2922 ‒C‒H (CH2) Stretching (asymmetrical)
2956 ‒C‒H (CH3) Stretching (asymmetrical)