Proposed Models for Subcritical Water Extraction of Essential Oils

摘要/Abstract

摘要： Mechanisms that control the extraction rate of essential oil from Zataria multiflora Boiss. (Z. multiflora) with subcritical water (SW) were studied. The extraction curves at different solvent flow rates were used to determine whether the extractions were limited primarily by the near equilibrium partitioning of the analyte between the matrix and solvent (i.e. partitioning thermodynamics) or by the rates of analyte desorption from the matrix (i.e. kinetics). Four simple models have been applied to describe the extraction profiles obtained with SW:(1) a model based solely on the thermodynamic distribution coefficient K_D, which assumes that analyte desorption from the matrix is rapid compared to elution;(2) one-site kinetic model, which assumes that the extraction rate is limited by the analyte desorption rate from the matrix, and is not limited by the thermodynamic (K_D) partitioning that occurs during elution;(3) two-site kinetic model and (4) external mass transfer resistance model. For SW extraction, the thermodynamic elution of analytes from the matrix was the prevailing mechanism as evidenced by the fact that extraction rates increased proportionally with the SW flow rate. This was also confirmed by the fact that simple removal calculations based on determined K_D (for major essential oil compounds) gave good fits to experimental data for flow rates from 1 to 4 ml·min^-1. The results suggested that the overall extraction mechanism was influenced by solute partitioning equilibrium with external mass transfer through liquid film.

关键词: essential oils, Zataria multiflora Boiss., subcritical water extraction, mechanism

Abstract: Mechanisms that control the extraction rate of essential oil from Zataria multiflora Boiss. (Z. multiflora) with subcritical water (SW) were studied. The extraction curves at different solvent flow rates were used to determine whether the extractions were limited primarily by the near equilibrium partitioning of the analyte between the matrix and solvent (i.e. partitioning thermodynamics) or by the rates of analyte desorption from the matrix (i.e. kinetics). Four simple models have been applied to describe the extraction profiles obtained with SW:(1) a model based solely on the thermodynamic distribution coefficient K_D, which assumes that analyte desorption from the matrix is rapid compared to elution;(2) one-site kinetic model, which assumes that the extraction rate is limited by the analyte desorption rate from the matrix, and is not limited by the thermodynamic (K_D) partitioning that occurs during elution;(3) two-site kinetic model and (4) external mass transfer resistance model. For SW extraction, the thermodynamic elution of analytes from the matrix was the prevailing mechanism as evidenced by the fact that extraction rates increased proportionally with the SW flow rate. This was also confirmed by the fact that simple removal calculations based on determined K_D (for major essential oil compounds) gave good fits to experimental data for flow rates from 1 to 4 ml·min^-1. The results suggested that the overall extraction mechanism was influenced by solute partitioning equilibrium with external mass transfer through liquid film.

Key words: essential oils, Zataria multiflora Boiss., subcritical water extraction, mechanism

M. Khajenoori, A. Haghighi Asl, F. Hormozi. Proposed Models for Subcritical Water Extraction of Essential Oils[J]. , 2009, 17(3): 359-365.

参考文献

1 Ayala, R.S., Luquede Castro, M.D., “Continuous subcritical water extraction as a useful tool for isolation of edible essential oils”, Food Chem., 75, 109-113(2001).
2 Ong, E.S., Han Cheong, J.S., Goh, D., “Pressurized hot water extraction of bioactive or marker compounds in botanicals and medicinal plant materials”, J. Chromatography A, 1112, 92-102(2006).
3 Aynehchi, Y., Pharmcognosy and Medicinal Plants of Iran, Tehran University Press, 228-234, Tehran, Iran(1991).
4 Khajenoori, M., Haghighi Asl, A., Hormozi, F., Eikani, M.H., Noori Bidgoli, H., “Subcritical water extraction of essential oils from Zataria multiflora Boiss”, J. Food Process Eng., 10.111/j. 1745-4530. 2008. 00245. X(2008).
5 Kubatova, A., Jansen, B., Vaudoisot, J.F., Hawthorne, S.B., “Thermodynamic and kinetic models for the extraction of essential oil from savory and polycyclic aromatic hydrocarbons from soil with hot(subcritical) water and supercritical CO₂ ”, J. Chromatography A., 975(1), 175-188(2002).
6 Shotipruk, A., Kiatsongserm, J., Pavassnt, P., Goto, M., Sasaki, M., “Pressurized hot water extraction of anthraquinones from the roots of Morinda citrifolia”, Biotechnol. Prog., 20, 1872-1875(2004).
7 Schwartzberg, H.G., Chao, R.Y., “Solute diffusivities in leaching process”, Food Technol., 36, 73-86(1982).
8 Gertenbach, D.D., “Solid-liquid extraction technologies for manufacturing nutraceuticals”, Shi, J., Mazza, G., Maguer, M.L., eds., Functional Foods:Biochemical and Processing Aspects(Volume 2), CRC Press, Boca Raton, Flordia(2002).
9 Windal, I., Miller, D.J., de Pauw, E., Hawthorne, S.B., “Supercritical fluid extraction and accelerated solvent extraction of dioxins from highand low-carbon fly ash”, Anal. Chem. 72, 3916-3921(2000).
10 Crank, J., The Mathematics of Diffusion, Clarendon, Oxford(1975).
11 Carlslaw, H.S., Jaeger, J.C., Conduction of Heat in Solids, Clarendon, Oxford(1959).
12 Cacace, J.E., Mazza, G., “Pressurized low polarity water extraction of lignans from whole flaxseed”, J. Food. Eng., 77, 1087-1095(2006).
13 Anekpankul, Th., Goto, M., Sasaki, M., Pavasant, P., Shotipruk, A., “Extraction of anti-cancer damnacathal from roots of Morinda citrifolia by subcritical water”, Sep. Purif. Technol., 55, 343-349(2007).

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