Determination of Caffeine, Theobromine, and Theophylline by HPLC-DAD in Beverages Commonly Consumed in Lima, Peru

Figure 3

Box plot showing the distribution of the concentrations of the most representative methylxanthine in each group: (a) soft drink-caffeine (mg/100 g sample), (b) sport drink-caffeine (mg/100 g sample), and (c) herbal tea-caffeine (mg/100 g sample).

(a)

(b)

(c)