Brewing tea with hot water for a short while is the most popular
way of tea drinking. Thus, extraction of tea with hot water was chosen
in this study. Infusion period was chosen from 3 to 30 min, and the
results showed that the maximum release of analytes reached at
10 min of infusion, followed by a constant decrease due to the
thermal instability of catechins. Extraction times was further optimized,
the results showed that exhaustive extraction could be achieved
when 0.5 g tea sample powder was extracted with 30 mL water
brewing for 10 minwith intermittent shaking, three times (Figure S1).