Supercritical carbon dioxide extraction of griseofulvin from the solid matrix obtained after solid-state fermentation.

ABSTRACT

Globally there is an increasing concern to minimize the use of organic solvents, particularly the chlorinated ones because of their suspected human carcinogenicity. The use of ecofriendly carbon dioxide as an alternative to organic solvents would be appropriate in the perspective of green technology. Supercritical carbon dioxide (SC-CO(2)) extraction is suitable for extraction of nonpolar compound with molecular weights less than 400. Griseofulvin is an antifungal antibiotic having a molecular weight of 353, making it amenable to SC-CO(2) extraction. This work brings out the potential of supercritical carbon dioxide extraction (SCFE) for downstream processing of griseofulvin from the solid matrix obtained after solid-state fermentation (SSF). The optimized conditions for SCFE of griseofulvin from dried media after SSF were a flow rate of 0.4 L/min, temperature of 60 degrees C, and contact time of 90 min (30 min static + 60 min dynamic) at a pressure of 450-455 bar.