Bioaccessibility of Metallic Ions and Phenolic Compounds in Teas From Miconia Albicans

Abstract

The bioaccessibility of Al, Ca, Cr, Cu, Mg, Zn, phenolics and flavonoids during in vitro gastrointestinal digestion of Canela de Velho (Miconia albicans) tea was investigated in 10 samples. Determinations were made by atomic and molecular absorption spectrometry. Metal concentrations in Canela de Velho tea ranged from 343 ± 18 to 1163 ± 36 µg g-1 for Al, 102 ± 23 to 347 ± 13 µg g-1 for Ca, 0.093 ± 0.009 to 0.109 ± 0.003 µg g-1 for Cr, 0.30 ± 0.05 to 0.9 ± 0.2 µg g-1 for Cu, 264 ± 27 to 633 ± 53 µg g-1 for Mg and 1.3 ± 0.3 to 3.1 ± 0.4 µg g-1 for Zn, while the bioaccessibility percentages