Effect of drying methods on physical and chemical properties of Ilex guayusa leaves

The influence of air-drying (AD), convection oven (CO) and solar drying (SOD) on the physical and chemical properties of Ilex guayusa leaves is discussed. Total ash (%), acid-insoluble ash (%), watersoluble ash (%), residual moisture (%) and caffeine content (%) were estimated. Additionally, alkaloi...

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Published inRevista Facultad Nacional de Agronomía, Medellín Vol. 71; no. 3; pp. 8617 - 8622
Main Authors Patricia Manzano Santana, Quijano-Avilés, María, Chóez-Guaranda, Ivan, Ana Barragán Lucas, Espinoza, Rafael Viteri, Martínez, Daysi, Camacho, Cinthia, Migdalia Miranda Martinez
Format Journal Article
LanguageEnglish
Published Bogota Universidad Nacional de Colombia 01.09.2018
Facultad de Ciencias Agrarias - Universidad Nacional de Colombia
Universidad Nacional de Colombia, Sede Medellín
Subjects
AGRONOMY
Air drying
Alkaloids
Ashes
Bioactive compounds
Biological activity
Caffeine
Chemical properties
Convection
Conventional oven
Drying
Drying ovens
Ethanol
Fats
Flavonoids
Ilex guayusa
Leaves
Metabolites
Organic chemistry
Phenols
Physical analysis
Quinones
Saponins
Secondary metabolites
Solar drying
Steroid hormones
Steroids
Sugar
Tannins
Secado al aire
Air drying
Cafeína
Secado solar
Solar drying
Ilex guayusa
Horno convencional
Conventional oven
Caffeine
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Summary:The influence of air-drying (AD), convection oven (CO) and solar drying (SOD) on the physical and chemical properties of Ilex guayusa leaves is discussed. Total ash (%), acid-insoluble ash (%), watersoluble ash (%), residual moisture (%) and caffeine content (%) were estimated. Additionally, alkaloids, flavonoids, reducing sugars, saponins, steroids, quinones, fats, phenols and tannins detection of dry leaves extracts were assessed. The results revealed that parameters of physical analysis were not affected by the drying techniques. The highest amount of secondary metabolites in ethanol and aqueous extracts were detected. In general, convection oven dried leaves showed the highest caffeine content (3.71%) and the lowest drying time (13 h) compared to other drying methods. The results revealed a fast method to dry Ilex guayusa leaves and indicate that this species possess a variety of bioactive compounds beneficial for health. Our results revealed an effective quick method to dry Ilex guayusa leaves without altering the content of beneficial bioactive components.
ISSN:0304-2847
2248-7026
2248-7026
DOI:10.15446/rfnam.v71n3.71667