Supercritical CO₂assisted extraction and LC-MS identification of picroside I and picroside II from Picrorhiza kurroa.
PHYTOCHEMICAL ANALYSIS : PCA 2013;
24:97-104. [PMID:
22753294 DOI:
10.1002/pca.2383]
[Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 06/03/2012] [Accepted: 06/07/2012] [Indexed: 06/01/2023]
Abstract
INTRODUCTION
Picroside I and picroside II have been studied intensively because of their pharmacological actions and clinical applications. Numerous methods have been reported for extracting picroside I and picroside II from Picrorrhiza. kurroa rhizomes. This is the first report of picroside I and picroside II extraction using the supercritical carbon dioxide assisted extraction technique.
OBJECTIVE
To develop supercritical carbon dioxide assisted extraction and LC-MS identification of picroside I and picroside II from the Picrorrhiza kurroa Royle rhizomes.
METHODOLOGY
Surface response methodology based on 3³ fractional factorial design was used to extract picroside I and picroside II from P. kurroa rhizomes. The effects of various process factors, namely temperature (40-80°C), pressure (25-35 MPa) and co-solvent (methanol) concentration (0-10% v/v) on extraction yield of the two compounds were evaluated. The picroside I and picroside II contents were determined using validated LC-MS methodology.
RESULTS
The maximum yield of picroside I (32.502 ± 1.131 mg/g) and picroside II (9.717 ± 0.382 mg/g) was obtained at the 10% v/v co-solvent concentration, 40°C temperature and 30 MPa pressure. The conventional Soxhlet assisted methanol extract of P. kurroa powder resulted in 36.743 ± 1.75 and 11.251 ± 0.54 mg/g yield of picroside I and picroside II, respectively.
CONCLUSION
Variation of concentration and extraction time showed a significant effect on the picroside I and picroside II yield. Supercritical carbon dioxide assisted extraction using methanol as a co-solvent is an efficient and environmentally sustainable method for extracting picroside I and picroside II from P. kurroa rhizomes.
Collapse