Chemicals
Analytical grade n-hexane used to extract raw oil from the J. curcas seeds was obtained from Merck, and HPLC grade acetone, the solvent to dissolve oil for IC analysis was from Thermal Fisher. Both were used without further purification. Phosphate standard stock solution (200 mg L−1) was obtained from Dionex (Dionex P/N 057590). Deionized water with a specific resistance of 17.8 MΩ cm or greater (Millipore) was used for eluent generation after filtration through 0.2 μm pore size membrane. Other chemicals used in total P determination were all of analytical grades