Estudio de la composición química del aceite esencial de orégano (Origanum vulgare spp.) de Tacna

Abstract

Resumen: Se analizó químicamente el aceite esencial de orégano (Origanum vulgare spp.) cultivado en la ciudad de Tacna (Perú). El análisis fisicoquímico determinó las siguientes características: color (L* 60,51, a* -2,83, b* 14,31), índice de refracción de 1,475; densidad específica de 0,9132, y solubilidad en alcohol de 75 ml. Asimismo, la composición química se evaluó mediante cromatografía de gases, acoplada a espectrometría de masas. El cromatograma mostró los siguientes porcentajes: l-4 terpineol, 26,56; timol, 18,80; g-terpineno, 11,77; 2-careno, 6,53; terpineol, 4,08; m-cimeno, 3,27; y carvacrol, 2,24, entre otros presentes en menor proporción. Palabras clave: orégano / cromatografía / composición química / aceite esencial Study on chemical composition of the oregano essential oil (Origanum vulgare spp.) from TacnaAbstRAct: The oregano essential oil (Origanum vulgare spp.) cultivated in the city of Tacna, Peru, has been chemically analyzed. The physicochemical analysis determined the following characteristics: color (L * 60,51, a * -2,83, b * 14,31), refractive index: 1,475; specific density: 0,9132 and solubility in alcohol: 75 ml. Also, the chemical composition was evaluated by gas chromatography coupled to mass spectrometry. The chromatogram showed the following percentages: l-4 terpineol with 26,56; thymol with 18,80; 11,77; 6,53; Terpineol, 4,08; 3,27 and carvacrol 2,24, among others present in smaller proportion.

Antioxidant and Antibacterial Capacities of Origanum vulgare L. Essential Oil from the Arid Andean Region of Chile and its Chemical Characterization by GC-MS

“…Table 1 shows the conditions, yields, and physical properties of the essential oil of oregano obtained by hydro-distillation. The density was 0.913 g/mL, and the refractive index was 1.4775; these values are similar to those reported previously for the same spice [ 21 , 22 ]. According to some research, the refractive index and density are proportionally related to the amount of phenols present [ 23 ].…”

“…Physicochemical characteristics were evaluated as described by Tellez-Monzón et al [ 21 ], with some modifications. The fresh essential oil’s specific density was measured using a 10 mL pycnometer at 20 °C.…”

Technical-economic analisys of the solvent-method optimization of Origanum vulgare essential oil extraction based on technical and quality criteria

“…Density results are among the ranges reported by the literature as found by [28]) with a density of 0.9132 / mL and for [29] with 0.9117 g/mL, they do not present significant differences. Unlike the refractive index, Paucar et al (2015) states that the physicochemical characteristics of the solvent are distributed in a dispersed manner in the cellular structure (greater or lesser concentration in parts of the plant matter) [34], which produces a lack of contact between its bonds making it possible to establish the same intermolecular force in The component to be extracted and having less attraction between them, produces the passage of light in greater or lesser quantity and therefore the variation of this parameter.…”

“…Regarding the extraction time, the data obtained show significant differences when compared with those of the literature, which were 3-4 h according to [7], 2 h 36 min according to [20] and 120 to 180 min according [26]. It can be inferred with the aforementioned that depending on the variety of raw material, solute-solvent ratio etc., short times that can go from 30 min can be obtained [27] to 60 min [28], this related to the way heat and mass transfer is performed to achieve thermal equilibrium.…”

Influence of Agronomic Practice on Total Phenols, Carotenoids, Chlorophylls Content, and Biological Activities in Dry Herbs Water Macerates

“…These effects are, inter alia, a derivative of the presence of thymol and carvacrol in thyme. These antioxidant compounds (phenolic derivatives) are present in thyme in large amounts: about 18–80% and 1–20% (for thymol and carvacrol, respectively) [ 10 , 11 ]. Two of these phenolic compounds (carvacrol and thymol) have strong antimicrobial activity against both bacteria and fungi, therefore, are considered to be useful as future fighting agents against drug-resistant microbial [ 12 ].…”