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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.

Authors
  • Jacques, Rosângela Assis
  • Krause, Laiza Canielas
  • Freitas, Lisiane dos Santos
  • Dariva, Cláudio
  • Oliveira, J Vladimir
  • Caramão, Elina Bastos
Type
Published Article
Journal
Journal of agricultural and food chemistry
Publication Date
Dec 12, 2007
Volume
55
Issue
25
Pages
10081–10085
Identifiers
PMID: 17985842
Source
Medline
License
Unknown

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.

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