Figure captions
Figure 1 The effect of crystallization temperature on content of palmitoleic acid (a) and the effect of crystallization temperature on yield of the palmitoleic acid at the first crystallization stage (b). Crystallization conditions: 5 g SPOMF, 60 mL solvent [SPOMF: solvent ratio 1:12 (w/v)], methanol and acetone as the solvents, crystallization time of 12 h.
Figure 2 Optimization of crystallization conditions at the first crystallization stage. Crystallization conditions (a): 5 g SPOMF, 60 mL solvent [SPOMF: solvent ratio 1:12 (w/v)], crystallization temperature of -20 °C, crystallization time of 12 h; (b): 5 g SPOMF, SPOMF to methanol ratio of 1:9 to 1:18 (w/v), crystallization temperature of -20 °C, crystallization time of 12 h; (c): 5 g SPOMF, 75 mL methanol [SPOMF to methanol ratio 1:15 (w/v)], crystallization temperature of -20 °C, crystallization time of 4 h to 12 h.