Optimization by Response Surface Methodology of Biodiesel Production from Podocarpus falcatus Oil as a Cameroonian Novel Nonedible Feedstock

Table 7

Main position of characteristic bands for oil and biodiesel.

PFO		BPFO
Absorption vibration (cm^-1)	Functional groups	Absorption vibration (cm^-1)	Functional groups
722	Deformation –CH2	722	Tilting –CH2
1362	CH2 group deformation vibration	1362	CH2 group deformation vibration
1744	Elongation C=O	1742	Elongation C=O
1169	Stretching C-O	1194; 1171; 1110	Elongation C-O; Elongation; C-O-O-CH2-C
1435	Deformation vibration; CH2	1435	Methyl ester group; (CO-O-CH3)
2925	Elongation –CH2	2927	Elongation –CH2