Seasonal variations in theaflavin, thearubigin and caffeine contents of argentinian black teas

Thirty‐three Argentinian black tea samples of three grades (BOP, BOPF and PF) obtained fortnightly were examined for their theaflavin (TF), thearubigin (TR) and total and extractable caffeine contents during the 1985/86 season. Total and extractable caffeine contents decreased gradually during most...

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Detalles Bibliográficos
Autor principal: Malec, L.S.
Formato: JOUR
Materias:
Black tea
caffeine
María S Vigo
seasonal variations
theaflavin
thearubigin
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00225142_v45_n2_p185_Malec
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Thirty‐three Argentinian black tea samples of three grades (BOP, BOPF and PF) obtained fortnightly were examined for their theaflavin (TF), thearubigin (TR) and total and extractable caffeine contents during the 1985/86 season. Total and extractable caffeine contents decreased gradually during most of the season after an early rapid increase. TF contents fluctuated following climatic variations, decreasing after rainy periods. Total colour and TF curves were consistent with there being a good linear correlation between them, whereas TR showed erratic fluctuations throughout the whole season. Copyright © 1988 John Wiley & Sons, Ltd

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