Nutrition Journal

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)	k₁ (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 ± 8^a	124 ± 6^a	2.4 x10⁻² ± 0.7 x10⁻²
Flavanoids	322 ± 22^b	310 ± 26^b	5.8 x10⁻⁴ ± 0.1x10⁻⁴

^aConcentration is expressed in mg/g GAE and ^bConcentration is expressed in mg/g EGCG equivalents
(C_∞ = the extraction capacity, C₂₀ = the concentration of the tea constituent in the solution at 20^th minute, k₁ = the second-order extraction rate constant)

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ISSN: 1475-2891

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