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Table 5 The main wavelengths in the FTIR functional groups of J. curcas seed oil hydrolysis

From: Hydrolysis optimization and characterization study of preparing fatty acids from Jatropha curcasseed oil

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)
  1. Notes: J. curcas seed oil (a), hydrolysis at 1.00 M of ethanolic KOH (b), hydrolysis at 1.75 M of ethanolic KOH (c).