A “Novel” Protocol for the Analysis of Hydroxycinnamic Acids in Leaf Tissue of Chicory (Cichorium intybus L., Asteraceae)

Figure 2

Histogram representing the contents (arbitrary unity) in caftaric acid (grey), chlorogenic acid (black), and chicoric acid (white) for each of the 24 different leaves analyzed by four inexperienced testers. The differences obtained between the manipulators are showed by the standard deviations (no significant differences; see Table 2).