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[Extraction and comparison of volatile oil components from water caltrop and kernel by supercritical carbon dioxide extraction].

OBJECTIVE
To extract the volatile components of water caltrop and kernel and to analyze them.


METHOD
The volatiles were separated by supercritical fluid extraction (SFE) and determined by GC-MS.


RESULT
The extraction rates of water caltrop and kernel were 5.96% and 0.23%, respectively. The components determined by normalization method were mainly 9, 12-octadecadienoic acid (Z, Z), but the content was different.


CONCLUSION
The researches showed that the components in the volatile components of water caltrop and kernel were mainly 12-octadecadienoic acid (Z, Z), and then palmitinic acid, with a higher extraction rate of caltrop.