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2022, Number 1

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Rev Cubana Plant Med 2022; 27 (1)

Microwave assisted extraction to obtain the hydroalcoholic extract of Aloe vera L. (aloe)

Salomón IS, Pérez SJC, López AM

Language: Spanish
References: 17
Page:
PDF size: 254.05 Kb.


ABSTRACT

Introduction: Aloe vera L. (aloe), widely used in traditional medicine, also has antitumor and immunostimulant effects. Its leaves have polysaccharides (of recognized anticancer activity) that are used as markers of quality control of the hydroalcoholic extract (50%) with which syrup is made. Microwave-assisted extraction, compared to conventional methods, is of recognized importance for the speed and efficiency in obtaining phytoconstituents.
Objective: To define the parameters of operation, extraction time and power in obtaining the hydroalcoholic extract from dried leaves of Aloe vera L. through the energy of microwaves.
Methods: A modified Sanyo EM-T109SS domestic microwave oven was used. The study of irradiation time and power factors was carried out using a design of 32 multilevel factorial response surface. The yield of total polysaccharides determined on the basis of mannose was used as a response variable.
Results: The optimal conditions were an irradiation time of 3.1 min, a power of 696 W and for a predicted value of total polysaccharides of 2.29 %, which does not differ statistically from the experimental value. Compared to the traditional method by maceration (24 h and 1.03±0.23% yield) microwave-assisted extraction demonstrated superiority in terms of significant time savings with greater recovery of polysaccharides.
Conclusions: The results showed that microwave-assisted extraction can be used as an efficient method to obtain hydroalcoholic extract of Aloe vera L.


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