Fig. 9: Discrimination of honey samples mixed with sirup or cheaper honey.

a Fluorescence response patterns and b canonical score plot against mixtures of honey and sirup. c Fluorescence response patterns and d canonical score plot against mixtures of honey and sirup against mixtures of vitex and rapeseed honey (3.0 mg/mL for each mixture sample). Pattern recognition of honey samples using SA11 ([CA] = [CD] = 1.0 μM, [LCG] = 1.0 μM). Canonical score plots for the two factors of simplified fluorescence response patterns obtained from LDA with 95% confidence ellipses. Error bars in a, c represent mean ± s.d. (n  =  6 independent experiments). The order of colored symbols from top to bottom in the legend corresponds to the column order of histogram from left to right in a, c.