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Table 1 Kinetic parameters for the extraction of nutraceuticals from tea infusion

From: Extraction Kinetics of phytochemicals and antioxidant activity during black tea (Camellia sinensis L.) brewing

  C (mg/g) C20 (mg/g) (observed) k 1 (g mg−1 min−1)
GA 8.0 ± 1.2 7.6 ± 1.9 7.8 x10−2 ± 0.2 x10−2
Caffeine 42.2 ± 2.7 42.1 ± 1.9 4.1 x10−3 ± 0.3 x10−3
EGCG 11.8 ± 0.4 11.2 ± 1.1 1.4 x10−2 ± 0.8 x10−2
Polyphenols 131 ± 8a 124 ± 6a 2.4 x10−2 ± 0.7 x10−2
Flavanoids 322 ± 22b 310 ± 26b 5.8 x10−4 ± 0.1x10−4
  1. aConcentration is expressed in mg/g GAE and bConcentration is expressed in mg/g EGCG equivalents
  2. (C = the extraction capacity, C20 = the concentration of the tea constituent in the solution at 20th minute, k 1  = the second-order extraction rate constant)