Figure 3.

FAMEs yields (peak area normalised by volume of toluene and sample weight) comparison under different acid concentrations under different incubation conditions (a)—70 °C for 2 h, (b)—80 °C for 2 h and (c)—100 °C for 1 h. The samples with a total solvent volume of 8 and 10 mL, a mass range from 200 to 400 mg and moisture between 0 and 7.5% were included to obtain the mean and standard deviation under the different conditions monitored. All experiments contained at least three replicates, except for extreme conditions (acid concentrations of 1 and 9%), where one replicate was performed. For details see Table S1.