OBTAINING AND ANALYSIS OF YIELD FOR EXTRACTION OF OILS AND EXTRACTS FROM HOP (HUMULUS LUPULUS L.) VIA SOLVENT EXTRACTION AND ULTRASOUND PRE-TREATMENT (Atena Editora)

Abstract

Hops (Humulus lupulus L.), a plant that belongs to the Cannabaceae family, has played an important role in the brewing industry, being an essential component in the production of beer, as it contributes to the chemical and sensorial qualities of the drink, imparting the aroma, bitterness, in addition to having antioxidant, anti-inflammatory, antifungal activities and other applications that can be associated with the insertion of the oily extract of this plant applied in different food products. In turn, extraction techniques are fundamental processes used to isolate specific constituents, primarily used to extract oils and essences that find applications in various fields, such as hops. The objective of this work was to comparatively analyze the yields obtained from the extraction of oils and extracts from Humulus lupulus L., using the solvent extraction technique with the application of ultrasound pre-treatment, aiming to optimize and improve these processes. For the three-hour extraction, 10 g of hops of the Citra® variety were used in T90 pellet format, previously crushed with particle size > 40 mesh, into 300 mL of solvent, hexane and ethanol being chosen for this work. And for the parameters used in ultrasound pretreatment, a duration of 20 minutes, a 12 mm tip and a power rate of 50% were defined. At the end of the extractions, the average yield results obtained for extractions with hexane and ethanol without pre-treatment were, respectively, 32.35% and 43.02% and with pre-treatment they were 25.27 % and 43.34%. From these results it was possible to conclude that the extraction of oil and essences from Humulus lupulus L. by solvent proved to be efficient, especially ethanol, and the use of ultrasound pre-treatment did not significantly influence the yield.