title: Influence of drying methods and agronomic variables on the chemical composition of mate tea leaves (Ilex paraguariensis A. St.-Hil) obtained from high-pressure CO2 extraction.
abstract: The main objective of this work is to assess the influence of two drying methods (microwave and vacuum oven) and some agronomic variables (plant fertilization conditions and sunlight intensity) on the characteristics of mate tea (Ilex paraguariensis) leaves extracts obtained from high-pressure carbon dioxide extractions performed in the temperature range from 20 to 40 degrees C and from 100 to 250 bar. Samples of mate were collected in an experiment conducted under agronomic control at Ervateira Barão LTDA, Brazil. Chemical distribution of the extracts was evaluated by gas chromatography coupled with a mass spectrometer detector (GC/MS). In addition to extraction variables, results showed that both sample drying methods and agronomic conditions exert a pronounced influence on the extraction yield and on the chemical distribution of the extracts.
authors.affiliation: Universidade Federal do Pampa, 96412-420 Bagé, RS, Brazil. rjacques.unipampa@ufpel.edu.br
authors.forename: Rosângela Assis
authors.initials: RA
authors.lastname: Jacques
authors.forename: Laiza Canielas
authors.initials: LC
authors.lastname: Krause
authors.forename: Lisiane dos Santos
authors.initials: Ldos S
authors.lastname: Freitas
authors.forename: Cláudio
authors.initials: C
authors.lastname: Dariva
authors.forename: J Vladimir
authors.initials: JV
authors.lastname: Oliveira
authors.forename: Elina Bastos
authors.initials: EB
authors.lastname: Caramão
mesh_terms: D002245:Carbon Dioxide; D003890:Desiccation / Q000379:methods*; D005511:Food Handling / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry; D030019:Ilex paraguariensis / Q000737:chemistry* / Q000254:growth & development; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D011312:Pressure
chemical_list: D010936:Plant Extracts; D002245:Carbon Dioxide