title: Influence of agronomic variables on the composition of mate tea leaves (Ilex paraguariensis) extracts obtained from CO2 extraction at 30 degrees C and 175 bar.
abstract: The aim of this work is to assess the influence of light intensity (plants with direct sun exposure and in a controlled light intensity) and age of leaves (6-24 months) on the characteristics of the extracts of mate tea leaves obtained from carbon dioxide at high pressures. Samples of mate were collected in an experiment conducted under agronomic control at Industria e Comercio de Erva-Mate Barão LTDA, Brazil. The content of selected organic compounds of the extracts was evaluated by gas chromatography together with mass spectrometry. Quantitative analysis of caffeine, theobromine, phytol, vitamin E, squalene, and stigmasterol was performed, and the results showed that field variables exert a strong influence on the liquid yield and on the chemical distribution of the extracts.
authors.affiliation: Department of Food Engineering, URI-Campus de Erechim, Av. Sete de Setembro 1621, Erechim-RS, Brazil, 99700-000.
authors.forename: Angela Aquino
authors.initials: AA
authors.lastname: Esmelindro
authors.forename: Jonathan Dos Santos
authors.initials: Jdos S
authors.lastname: Girardi
authors.forename: Altemir
authors.initials: A
authors.lastname: Mossi
authors.forename: Rosângela Assis
authors.initials: RA
authors.lastname: Jacques
authors.forename: Cláudio
authors.initials: C
authors.lastname: Dariva
mesh_terms: D000383:Agriculture / Q000379:methods*; D001938:Brazil; D002245:Carbon Dioxide; D005524:Food Technology; D030019:Ilex paraguariensis / Q000737:chemistry*; D008027:Light; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D011312:Pressure; D013997:Time Factors
chemical_list: D010936:Plant Extracts; D002245:Carbon Dioxide