[Study on the chemical substrates of SFE extract from Rhizoma Cyperi]

To extract the effective part of Rhizoma Cyperi and study the chemical constituents of diffrent parts.

The extract of Rhizoma Cyperi was obtained by SFE and dealed with molecular distillation, then the effective components was enriched. The chemical compositions were separated and identified by GC/MS.

The content of volatile oil in the extract upgraded from 43.2% to 86.0% by molecular distillation, and the relative amount of cyperene and (+) -alpha-cyperone from 20.2% to 38.6%. Fatty acids was not found in Rhizoma Cyperi-MD1.

The SFE of Rhizoma Cyperi could be refined with molecular distillation. The active ingredients, such as volatile oil and alpha-cyperolone, were remained effectively. The ineffective ingredients fatty acids were removed.