Loss of essential oil of tarragon (<i>Artemisia dracunculus</i> L.) due to drying

Arabhosseini, Akbar; Padhye, Sudhakar; Beek, T.A. van; Boxtel, A.J.B. van; Huisman, W.; Posthumus, M.A.; Müller, Joachim

doi:10.1002/jsfa.2641

Cited by 54 publications

(20 citation statements)

References 19 publications

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“…The most common approach is to compare the effects of different temperatures and airflow on essential oil, as shown in ]. This phenomenon is mainly attributed to the fact that the evaporation of the essential oils cannot be achieved at low temperature [66]. In addition, at high drying temperatures, the oil glands might rupture at the initial stages of drying where the rate is higher and the oil rapidly evaporates [68].…”

Section: Essential Oilmentioning

confidence: 98%

Drying Technologies: Vehicle to High-Quality Herbs

2015

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Herbs are usually marketed as dry due to a consumer demand beyond their seasonality; dehydration leads to a stable, easily moveable product that is available throughout the year. The process of drying, though, leads to modifications in the appearance, composition and quality of the raw material. The extent of these alterations depends on the applied drying methodology and its parameters, rendering the optimization of this process imperative. Numerous studies examining the effect of drying on the main characteristics of herbs have been published in recent years, and this review aims at organizing the available information of the studied herbs, drying methods and measured parameters in a comprehensive manner. Primarily, since aroma is the main characteristic of herbs and the principal aim for the end product is to retain the raw material's character, this review will focus on the most widely studied effect of drying, which is the essential oil yield and composition. Secondly, results from various studies on the influence of drying on biochemical compounds, organoleptic properties of dried herbs are also presented. The most common approach to the study of drying kinetics is also presented. Finally, novel technologies targeting to minimize the magnitude of changes from the raw material are described.

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Section: Essential Oilmentioning

confidence: 98%

Drying Technologies: Vehicle to High-Quality Herbs

2015

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“…However, prolonged drying time associated with natural air drying and quality loss associated with hot air drying are drawbacks of these methods. [11,12] Microwave drying has been shown to drastically shorten drying time but causes considerable essential oil loss and color change. [13] Therefore, microwave dryers should be continuously monitored and elaborately controlled to preserve the product quality.…”

Section: Introductionmentioning

confidence: 99%

Peppermint Drying Performance of Contact Dryer in Terms of Product Quality, Energy Consumption, and Drying Duration

et al. 2011

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TurkeyDrying is a commonly used postharvest operation for medicinal and aromatic plants. Their high initial moisture contents, requirement of moderate drying temperatures, and quick deterioration of their quality attributes make their drying processes energy intensive and time consuming. These properties may also cause the dried product to be of heterogeneous quality. A contact dryer that transferred energy to drying plants mainly by heat conduction was developed and tested by mixing or not mixing batches of 15 kg of chopped peppermint plants. The contact dryer had three main operational units: a drying table, a mobile mixing/aeration car, and a control panel. The contact dryer was operated with one of four drying programs. All programs affected the completion duration of drying, essential oil content, and dried product color differently. The shortest drying time (15 h) was obtained using the drying program of gradually increased water temperature from 55-60 to 75-80 C in 6 h and mixing/aeration. However, mixing and aeration changed the product color slightly more and partially increased essential oil loss. These drawbacks can be alleviated by selecting the appropriate duration of mixing and aeration. The menthol and menthone percentages of fresh peppermint essential oil ranged from 31.02 to 34.02% (average value: 32.52%) and 23.23 to 26.47% (average value: 24.85%), respectively. The menthol and menthone percentages of dried peppermint essential oil ranged from 22.74 to 42.07% and from 8.95 to 21.76%, respectively. The significant variations in the essential oil composition of dried peppermint leaves within replications were possibly caused by the variations associated with the age and cutting order of fresh peppermint plants at harvest. INTRODUCTIONDrying has been a widely used preservation method for agricultural materials and foods since ancient times. The success and sustainability of a drying process are controlled by the quality retention of dried products, specific energy consumption, ability to dry different wet materials, and investment=operational cost. [1][2][3] Successful drying processes can be defined as removing unnecessary water from the materials or foods as fast as possible while preserving product quality and minimizing energy consumption. Using alternative energy sources to operate a dryer, reducing the cost of a dryer, and the use of a dryer for various wet materials influence the environmental and economical sustainability of a dryer. A universal dryer with all of the preferred financial, operational, and environmental attributes has not been developed because each material usually requires unique drying conditions and industrial locations around the world face different financial and technologic conditions. Therefore, many types of dryers (over 400) using various drying methods have been developed and used in industry and agriculture. [3] Specific energy consumption, which is the amount of the energy used to remove 1 kg water from a wet material, is used for cost-effective operation of indu...

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“…Apesar destes benefícios da secagem antes do processo de obtenção do óleo essencial, pode haver interferência da secagem sobre aspectos da qualidade do óleo e no rendimento do processo de obtenção do óleo essencial, em relação ao obtido da planta in natura (Arabhosseini et al, 2006). Em geral, observa-se que a secagem promove um aumento da concentração do componente principal do óleo essencial, mas, simultaneamente, restringe a variedade de compostos nele presentes (Buchaillot et al, 2009;Carvalho Filho et al, 2006;Figiel et al, 2010;Mejri et al, 2010).…”

Section: Introductionunclassified

Influência De Condições Operacionais Da Secagem De Capim-Cidreira (Cymbopogon Citratus (Dc.) Stapf.) Sobre O Rendimento Do Processo De Obtenção Do Óleo Essencial

Bonilha¹,

Vieira²

2017

Blucher Chemical Engineering Proceedings

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RESUMO -O processo de secagem de plantas medicinais como etapa precedente à obtenção do óleo essencial auxilia na conservação da matéria-prima, assim como, evita que a produção do óleo seja comprometida por fatores como a sazonalidade da planta. No entanto, a secagem pode influenciar sobre as características do óleo essencial. Neste trabalho, analisou-se a influência da temperatura, do tempo de secagem de folhas de capim-cidreira (Cymbopogon citratus (DC.) Stapf) e do tempo de hidrodestilação, sobre o rendimento do processo. Com base em um planejamento fatorial completo e uma análise de variância, verificou-se que somente as variáveis relacionadas à secagem influenciaram sobre o rendimento, o que pode ser explicado pela remoção de componentes do óleo essencial durante a secagem. INTRODUÇÃOOs óleos essenciais são substâncias presentes em algumas plantas, sendo, em muitos casos, as principais responsáveis pelo seu aroma e sabor. São compostos por uma mistura de componentes voláteis de diferentes funções químicas (Martim et al., 2012). Alguns desses componentes conferem características aromáticas de grande interesse na indústria alimentícia e na produção de artigos de higiene e limpeza. Existem também óleos essenciais que possuem propriedades terapêuticas importantes. Especificamente, as folhas do capim-cidreira (Cymbopogon citratus (D.C.) Stapf), também conhecido por capim-limão ou capim-santo, apresentam propriedades medicinais analgésicas, anti-inflamatórias e são também empregadas no tratamento de distúrbios gastrointestinais (Balti et al, 2014). O óleo essencial de capimcidreira é inibidor do desenvolvimento das larvas de alguns insetos transmissores de doenças, como o Aedes aegypti, além de possuir efeito repelente (Negrelle; Gomes, 2005). Devido ao seu alto teor de citral (Barbosa et al., 2008), o óleo essencial de capim-cidreira é aplicado nas indústrias alimentícias e de cosméticos, já que essa substância remete a aromas cítricos.Os óleos essenciais podem ser obtidos através de processos como a hidrodestilação e o arraste a vapor. Na hidrodestilação, as plantas de interesse são imersas em água e o sistema é aquecido até que haja um destilado bifásico, composto pelo óleo essencial e por uma fase aquosa (hidrolato). Estas fases podem ser facilmente separadas por decantação simples (Kubeczka, 2010). Já no processo por arraste a vapor, o vapor de água -e não água líquida -

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Loss of essential oil of tarragon (Artemisia dracunculus L.) due to drying

Cited by 54 publications

References 19 publications

Drying Technologies: Vehicle to High-Quality Herbs

Drying Technologies: Vehicle to High-Quality Herbs

Peppermint Drying Performance of Contact Dryer in Terms of Product Quality, Energy Consumption, and Drying Duration

Influência De Condições Operacionais Da Secagem De Capim-Cidreira (Cymbopogon Citratus (Dc.) Stapf.) Sobre O Rendimento Do Processo De Obtenção Do Óleo Essencial

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