RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth

The composition of essential oils extracted from plants can present great variability, even between individuals of the same species due to different conditions, such as extraction methods, climate and soil composition, among others. Most methods available for the determination of essential oil compo...

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Autores principales:	Delgado Ospina,Johannes, Grande Tovar,Carlos David, Menjívar Flores,Juan Carlos, Sánchez Orozco,Manuel Salvador
Lenguaje:	English
Publicado:	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias 2016
Materias:	Medicinal plants secondary metabolites analysis GC/MS
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902016000200006
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spelling	oai:scielo:S0719-389020160002000062016-09-26RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides KunthDelgado Ospina,JohannesGrande Tovar,Carlos DavidMenjívar Flores,Juan CarlosSánchez Orozco,Manuel Salvador Medicinal plants secondary metabolites analysis GC/MS The composition of essential oils extracted from plants can present great variability, even between individuals of the same species due to different conditions, such as extraction methods, climate and soil composition, among others. Most methods available for the determination of essential oil composition, such as gas chromatography-mass spectrometry (GC/MS), are expensive and time consuming, which prevents farmers or producers from determining the true value of their product or performing in-line quality control in production. Therefore, practical tools are required to test the quality of essential oils in a quick and inexpensive way. The aim of this study was to determine the relationship between the concentration of thymol and refractive index of essential oils as a quality control measure in Lippia origanoides Kunth, an aromatic and medicinal plant with a large content of thymol. Essential oils were extracted by steam distillation from leaves of 5-month-old plants. A Clevenger type apparatus was used for extraction. The refractive index was measured with an Abbe refractometer, while the concentration of thymol was determined by GC-MS. It was found that thymol concentration and refractive index are adjusted in a linear equation y = 0.00030x + 1.4893 with a correlation coefficient of 0.9439, demonstrating that the refractive index of the essential oils of Lippia origanoides Kunth can be used to determine the thymol concentration of the oil.info:eu-repo/semantics/openAccessUniversidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias VeterinariasChilean journal of agricultural & animal sciences v.32 n.2 20162016-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902016000200006en10.4067/S0719-38902016000200006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Medicinal plants secondary metabolites analysis GC/MS
spellingShingle	Medicinal plants secondary metabolites analysis GC/MS Delgado Ospina,Johannes Grande Tovar,Carlos David Menjívar Flores,Juan Carlos Sánchez Orozco,Manuel Salvador RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth
description	The composition of essential oils extracted from plants can present great variability, even between individuals of the same species due to different conditions, such as extraction methods, climate and soil composition, among others. Most methods available for the determination of essential oil composition, such as gas chromatography-mass spectrometry (GC/MS), are expensive and time consuming, which prevents farmers or producers from determining the true value of their product or performing in-line quality control in production. Therefore, practical tools are required to test the quality of essential oils in a quick and inexpensive way. The aim of this study was to determine the relationship between the concentration of thymol and refractive index of essential oils as a quality control measure in Lippia origanoides Kunth, an aromatic and medicinal plant with a large content of thymol. Essential oils were extracted by steam distillation from leaves of 5-month-old plants. A Clevenger type apparatus was used for extraction. The refractive index was measured with an Abbe refractometer, while the concentration of thymol was determined by GC-MS. It was found that thymol concentration and refractive index are adjusted in a linear equation y = 0.00030x + 1.4893 with a correlation coefficient of 0.9439, demonstrating that the refractive index of the essential oils of Lippia origanoides Kunth can be used to determine the thymol concentration of the oil.
author	Delgado Ospina,Johannes Grande Tovar,Carlos David Menjívar Flores,Juan Carlos Sánchez Orozco,Manuel Salvador
author_facet	Delgado Ospina,Johannes Grande Tovar,Carlos David Menjívar Flores,Juan Carlos Sánchez Orozco,Manuel Salvador
author_sort	Delgado Ospina,Johannes
title	RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth
title_short	RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth
title_full	RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth
title_fullStr	RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth
title_full_unstemmed	RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth
title_sort	relationship between refractive index and thymol concentration in essential oils of lippia origanoides kunth
publisher	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902016000200006
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RELATIONSHIP BETWEEN REFRACTIVE INDEX AND THYMOL CONCENTRATION IN ESSENTIAL OILS OF Lippia origanoides Kunth

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