Supercritical fluid extraction and capillary gas chromatography of the rhizomes of Z. zerumbet

Supercritical carbon dioxide at 60°C and 200 bar has been used to extract the nonpolar components of the dried rhizomes of Zingiber zerumbet . The extract could be fractionated by placing an on‐line silica column before the pressure relief valve. The extracts were analyzed using capillary GC and GC‐MS. This technique provides an effective means of sample preparation and a relatively fast way of determining the constituents of plant materials.