Figure 8
From: Novel 1H low field nuclear magnetic resonance applications for the field of biodiesel
Comparison of the NMR spectra and relaxation time distributions of two rapeseed biodiesel samples containing high and low acylglycerol residues. Data was acquired using (A)-(B) 1H HR-NMR and (C)-(D) 1H LF-NMR of two rapeseed biodiesel samples A and B prepared with 0.05 and 0.5% KOH catalyst respectively, to achieve high and low acylglycerol residues. Peak numbers on (A) and (B) correspond to the peaks assignment in Table 2. Relaxation time distribution data was calculated using the WinDXP tool package and PDCO.