acidified with 1 mL HCl per 40 mL sample immediately after harvest. Extraction with n-hexane occurred over 4 h in a Soxhlet apparatus. Distillation of the solvent was performed in a Büchi R-200 rotavapor for 30 min at 70◦C. Measurements were performed in duplicate and averaged. Net digestion results were corrected for dilution due to 2N NaOH addition during digestion.