Publicação
Studies on the solubility and partition of terpenes in aqueous organic solvents
| Resumo: | Terpenes are organic compounds, produced by various plants, in particular conifers, and which represent the main constituents of the essential oils of these plants. The vast majority of terpenes are widely used in different industrial sectors such as flavors, perfumes, spices, cosmetics or food additives, and due to their biological activity they are also used for pharmaceutical and medical purposes. It is therefore very crucial to carry out studies on the solubility or the partition coefficient of a terpene, since these equilibrium data make it possible to optimally determine the adequate solvent for the extraction or purification of a certain compound while by limiting costs, losses and environmental nuisances. In this context, this work reports the solubility and the partition coefficient of four terpenes (thymol, eugenol, carvacrol and camphor) in organic and aqueous solvents (ethanol/water, l octanol/water, methanol/heptane, ethyl acetate /water, ethanol) at 298.15 and 313.15 K, using the shake-flask method and Abraham's solvation model to describe solubility data. The results obtained were satisfactory with regard to the solubility of thymol in ethanol (at 298.15 K and 313.15 K) or the partition coefficient of eugenol in the octanol/water solvent mixture (at 298.15 K), since they are in agreement with the experimental data available in the literature. On the other hand, for carvacrol and camphor, no solubility study was found in the literature for the temperatures studied. However, the conclusive results obtained could reassure on the effectiveness of the methods used in this work. |
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| Autores principais: | Stiphane, Sieyabdji Michel |
| Assunto: | Terpenes Plants |
| Ano: | 2023 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| Resumo: | Terpenes are organic compounds, produced by various plants, in particular conifers, and which represent the main constituents of the essential oils of these plants. The vast majority of terpenes are widely used in different industrial sectors such as flavors, perfumes, spices, cosmetics or food additives, and due to their biological activity they are also used for pharmaceutical and medical purposes. It is therefore very crucial to carry out studies on the solubility or the partition coefficient of a terpene, since these equilibrium data make it possible to optimally determine the adequate solvent for the extraction or purification of a certain compound while by limiting costs, losses and environmental nuisances. In this context, this work reports the solubility and the partition coefficient of four terpenes (thymol, eugenol, carvacrol and camphor) in organic and aqueous solvents (ethanol/water, l octanol/water, methanol/heptane, ethyl acetate /water, ethanol) at 298.15 and 313.15 K, using the shake-flask method and Abraham's solvation model to describe solubility data. The results obtained were satisfactory with regard to the solubility of thymol in ethanol (at 298.15 K and 313.15 K) or the partition coefficient of eugenol in the octanol/water solvent mixture (at 298.15 K), since they are in agreement with the experimental data available in the literature. On the other hand, for carvacrol and camphor, no solubility study was found in the literature for the temperatures studied. However, the conclusive results obtained could reassure on the effectiveness of the methods used in this work. |
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