Fig. 2.

RP-HPLC analysis of: a) l-ascorbic acid and individual phenolic compounds on dry mass basis, b) p-coumaric acid, c) ferulic acid and d) quercetin in digested (initial phase, salivary phase, gastric phase and intestinal phase) spinach (S) and φ(lemon juice)=20% (L₂₀) formulations. Data are presented as mean value±S.D, N=3. Different letters indicate significant differences at p≤0.05 for all samples and phases together. Asterisk indicates significant differences at p≤0.05 for each phase individually