<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Characteristics and Empirical Modelling of Extract from Hibiscus sabdariffa Using Supercritical CO2 Extraction with Ethanol-Water as Modifier"^^ . "The main constituents of the extract from Hibiscus sabdariffa calyces are anthocyanins which gave intense natural red colorant and commonly used for centuries for therapeutic purposes. Supercritical carbon dioxide (SC-CO2) technique could produce high-quality extracts from plant materials as it can exploit the non-toxic character and the gas�liquid properties of the SC-CO2. This research aimed to characterise the colour and the pattern of Hibiscus sabdariffa SC-CO2 extraction. The colour was evaluated by using a CIELAB method meanwhile the presence of anthocyanins in the red colour extract was confirmed by High-Performance Liquid Chromatograph (HPLC). Two types of empirical models (Modified Brunner�s and Esquivel�s models) were used to describe the extracts obtained at series of operational parameters (i.e. pressure and temperature) at 7.5 and 10 of modifier ratio, with a total solvent flow rate of 4 ml/min. Both models were analysed using a non-linear regression method. The modified Brunner�s model shows the best agreement between experimental and model calculated data with the lowest AARD of 1.30 at 70 °C, 10 MPa, and 10 modifier ratio. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd."^^ . "2021" . . . "Springer Science and Business Media Deutschland GmbH"^^ . . "Springer Science and Business Media Deutschland GmbH"^^ . . . "Lecture Notes in Mechanical Engineering"^^ . . . "21954356" . . . . . . . . . . . . . . . . . . . . . . . . . "N.A.M."^^ . "Rasidek"^^ . "N.A.M. Rasidek"^^ . . "N.F.M."^^ . "Idrus"^^ . "N.F.M. Idrus"^^ . . "N.R."^^ . "Putra"^^ . "N.R. Putra"^^ . . "M.S.H."^^ . "Ruslan"^^ . "M.S.H. Ruslan"^^ . . "Z."^^ . "Idham"^^ . "Z. Idham"^^ . . "N."^^ . "Mili"^^ . "N. Mili"^^ . . "M.A.C."^^ . "Yunus"^^ . "M.A.C. Yunus"^^ . . . . . "HTML Summary of #15706 \n\nCharacteristics and Empirical Modelling of Extract from Hibiscus sabdariffa Using Supercritical CO2 Extraction with Ethanol-Water as Modifier\n\n" . "text/html" . .