Table 5 The main wavelengths in the FTIR functional groups of J. curcas seed oil hydrolysis
Wavelength of oila | Wavelength of 1.00Mb | Wavelength of 1.75Mc | Functional group |
|---|---|---|---|
3009 | 3009 | 3009 | C = C bending vibration (aliphatic) |
2927, 2855 | 2925, 2854 | 2924, 2854 | C-H stretching vibration (aliphatic) |
1746 | 1739 | - | C = O stretching vibration (ester) |
- | 1711 | 1711 | C = O stretching vibration (carboxylic acid) |
1463 | 1464 | 1463 | C-H scissoring and bending for methylene |
- | 1283 | 1285 | C-O stretching asymmetric (carboxylic acid) |
1163 | 1180 | - | C-O bending vibration (ester) |
- | 937 | 918 | O-H bending vibration (carboxylic acid) |
722 | 722 | 722 | C-H group vibration (aliphatic) |