Abstract
Encapsulated Salvia officinalis L. powder (SESP) was developed from extract obtained by supercritical fluid extraction (SFE), and it was compared with commercial sage powder of hydro-distillation extract (HESP). The optimised conditions of 30 MPa at 50 °C for laboratory scale SFE extraction were found to generate the highest yield at 40.96 ± 0.84%. The conditions were later applied in the upscaled extraction, which yielded about 30.10 ± 1.33% extract. Large particle size distribution at 118.46 ± 6.63 µm for SESP was notified as compared to 66.80 ± 1.50 µm for HESP. Outcomes of crystallographic analysis demonstrated that abundant metabolites from various groups existed in both powders. About 25 and 43 metabolites were identified by Gas Chromatography-Mass Spectrometry (GC–MS) in HESP and SESP, respectively. In HESP, organic acids were found to be the major group identified, while terpenoids were the largest group found in SESP.
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•30 MPa at 50 °C as optimum used for upscaled supercritical fluid extraction process.•Encapsulated powder from SESP show broader particle size distribution than HESP.•Supercritical extraction were found to generate the highest yield at 40.96 ± 0.84%.•HESP and SESP revealed about 25 and 43 metabolites, respectively.•Organic acids & terpenoids as major group identified in HESP and SESP, respectively.