Figure 2: Solvent extraction efficiency comparison. The extraction efficiency is determined by the comparison of recovered lipids to the total lipid content of the dry weight biomass as determined by the ASE. Samples are grouped by solvent compound (1-butanol, heptane, hexane) each at a distinct solvent to dry weight ratio. Grayscale bars show primary and secondary extraction. a. Extractions performed on dry algae; b. Algae sample 20% dry weight; c. Algae sample 2.5% dry weight, due to experimental limitations 2:1 solvent to dry weight ratio extractions were not conducted.