The estimation of kinetic parameters of the solid-liquid extraction process of the lavender flower (Lavandula x hybrida L.)

Abstract

The use of medicinal plants has been well documented for the past several decades. Plants from the Lavender genus are used for culinary purposes, but also as a part of herbal medicine, owing its benefits to essential oils and bioactive compounds. A detailed description of the extraction process dynamics is required to obtain the highest possible amount of bioactive compounds from lavender. In this study, a solid-liquid extraction of lavender flowers, using water as solvent, was performed. Total polyphenols, dry matter, conductivity, and total dissolved solids were determined in regular time intervals and experimental data was further used for mathematical modelling. Peleg's, Page's, and the logarithmic model were applied in order to describe the kinetics of bioactive compounds in lavender during solid-liquid extraction. The initial extraction rate and extraction capacity were determined for three different extraction temperatures; T = 40, 60, and 80 °C. The obtained results indicated that the initial extraction rate and the extraction capacity were the highest at T = 80 °C. The adequacy of the applied mathematical models was estimated based on R 2 and SRMSE values, which indicated that the most adequate model for solid-liquid extraction of lavender was the Peleg's model (R 2 = 0.996, for total polyphenols at T = 40 ºC and R 2 = 0.975 for dry matter at T = 60 °C, respectively).

Combined impact of pulsed electric field and ultrasound on bioactive compounds and FT-IR analysis of almond extract

“…A significant increase in EC was found by PEF, US and PEF-US than untreated extract. Similar findings regarding EC were recorded for combined treatment US and ohmic hydro-distillation for extract from zenyan oil (CVETKOVIĆ et al 2018). Protein mixture results were 1.861, 1.927 and 1.944 mg/mL for US, PEF, and PEF-US, and a significant difference (p \ 0.05) was observed in PEF-US sample than control (1.80).…”

Development of ANN models based on combined UV‐vis‐NIR spectra for rapid quantification of physical and chemical properties of industrial hemp extracts

“…TDS of industrial hemp extracts were determined using a Seven Compact conductometer (Mettler Toledo, Greifensee, Switzerland). After cooling the hemp extracts to room temperature, a probe was submerged into the extracts and left until the TDS on the conductometer stabilised 29 . All measurements were carried out in duplicate, and average results were further used for modelling.…”

Recovery of Red Pigments from Monascus purpureus FTC 5357 by Extraction of Fermented Solids: Operational Conditions and Kinetics

“…Three widely used models of extraction kinetics [28,30] were evaluated for extraction of the red pigments from the fermented solids. The models were the first-order kinetic model [31], Peleg's model [4,26,28,30,32,33] and logarithmic model [4,26,28,30]. The equations of the model were as follows:…”

“…Natural colorants extracted from plants, animals and microorganisms are in demand as substitutes for synthetic pigments used as food colorants. Although most natural colorants are extracted from plants [1][2][3][4][5], microorganisms [6][7][8][9][10][11] offer an attractive alternative for several reasons. Unlike plants, microorganisms can be grown anywhere, anytime and under controlled culture conditions to provide a high and consistent productivity of the target compound.…”

“…Extraction of diverse natural products has been studied, but mainly from plant materials [1,3,4,[26][27][28], not fermented solids. Thus, this work reports on solvent extraction of Monascus red pigments from fermented solids.…”