## 3 Results and Discussion
** & **Compound** & **Relative Amount** & **Relative Amount** & **Relative Amount** & **F** & **p** \\  & **(\%) in LEACH** & **(\%) in TWE** & **(\%) in FWE** & **(\%) in FWE** & & **p** \\ \hline
1 & gallic acid [1] & 0.85 \(\pm\) 0.01 \({}^{\text{a}}\) & 3.47 \(\pm\) 0.87 \({}^{\text{b}}\) & 1.88 \(\pm\) 0.04 \({}^{\text{ab}}\) & 13.11 & 0.033 \\
2 & ethyl gallate [1] & 0.82 \(\pm\) 0.01 \({}^{\text{a}}\) & 1.45 \(\pm\) 0.92 \({}^{\text{a}}\) & n.d. \({}^{\text{(a)}}\) & 3.58 & 0.161 \\
3 & unidentified phenolic & 2.03 \(\pm\) 0.02 \({}^{\text{a}}\) & 1.05 \(\pm\) 0.46 \({}^{\text{b}}\) & 0.22 \(\pm\) 0.12 \({}^{\text{b}}\) & 21.05 & 0.017 \\
4 & caffe acid [2] & 2.60 \(\pm\) 0.03 \({}^{\text{a}}\) & 3.60 \(\pm\) 1.22 \({}^{\text{a}}\) & 3.71 \(\pm\) 0.12 \({}^{\text{a}}\) & 1.45 & 0.363 \\
5 & chlorogenic acid [2] & 0.06 \(\pm\) 0.08 \({}^{\text{a}}\) & 12.72 \(\pm\) 0.13 \({}^{\text{b}}\) & 4.51 \(\pm\) 0.14 \({}^{\text{c}}\) & 5374 & \textless{}0.001 \\
6 & gentisic acid [1] & 6.78 \(\pm\) 0.05 \({}^{\text{a}}\) & 43.84 \(\pm\) 6.18 \({}^{\text{b}}\) & 10.23 \(\pm\) 6.55 \({}^{\text{a}}\) & 29.78 & 0.011 \\
7 & \(p\)-coumaric acid [2] & n.d. \({}^{\text{(a)}}\) & 6.54 \(\pm\) 0.41 \({}^{\text{b}}\) & 0.36 \(\pm\) 0.20 \({}^{\text{a}}\) & 368.8 & \textless{}0.001 \\
8 & unidentified phenolic & 4.45 \(\pm\) 0.02 \({}^{\text{a}}\) & 0.31 \(\pm\) 0.10 \({}^{\text{b}}\) & 0.29 \(\pm\) 0.40 \({}^{\text{b}}\) & 199.7 & \textless{}0.001 \\
9 & unidentified phenolic & 1.16 \(\pm\) 0.01 \({}^{\text{a}}\) & 3.29 \(\pm\) 0.46 \({}^{\text{b}}\) & 7.70 \(\pm\) 0.09 \({}^{\text{c}}\) & 289.8 & \textless{}0.001 \\
10 & unidentified phenolic & 1.15 \(\pm\) 0.01 \({}^{\text{a}}\) & 1.15 \(\pm\) 0.02 \({}^{\text{a}}\) & 5.37 \(\pm\) 0.35 \({}^{\text{b}}\) & 276.1 & \textless{}0.001 \\
11 & unidentified flavonoidoid & 4.78 \(\pm\) 0.04 \({}^{\text{a}}\) & 1.42 \(\pm\) 0.24 \({}^{\text{b}}\) & 6.42 \(\pm\) 0.08 \({}^{\text{c}}\) & 599.3 & \textless{}0.001 \\
12 & syringic acid [1] & 9.93 \(\pm\) 0.01 \({}^{\text{a}}\) & n.d. \({}^{\text{(b)}}\) & 11.09 \(\pm\) 0.79 \({}^{\text{a}}\) & 343.5 & \textless{}0.001 \\
13 & rutin [3] & 21.33 \(\pm\) 0.08 \({}^{\text{a}}\) & n.d. \({}^{\text{(b)}}\) & 3.61 \(\pm\) 0.56 \({}^{\text{c}}\) & 2373 & \textless{}0.001 \\
14 & unidentified flavonoidoid & 13.87 \(\pm\) 0.13 \({}^{\text{a}}\) & n.d. \({}^{\text{(b)}}\) & 5.83 \(\pm\) 0.25 \({}^{\text{c}}\) & 3549 & \textless{}0.001 \\
15 & unidentified flavonoidoid & 1.39 \(\pm\) 0.02 \({}^{\text{a}}\) & 5.46 \(\pm\) 1.57 \({}^{\text{ab}}\) & 7.14 \(\pm\) 0.52 \({}^{\text{b}}\) & 18.33 & 0.021 \\
16 & unidentified flavonoidoid & 0.64 \(\pm\) 0.01 \({}^{\text{ab}}\) & 0.13 \(\pm\) 0.17 \({}^{\text{a}}\) & 1.47 \(\pm\) 0.46 \({}^{\text{b}}\) & 10.83 & 0.043 \\
17 & quercetin-3-O-glucopyranoside [3] & 8.14 \(\pm\) 0.01 \({}^{\text{a}}\) & 0.66 \(\pm\) 0.14 \({}^{\text{b}}\) & 7.60 \(\pm\) 0.83 \({}^{\text{a}}\) & 142 & 0.001 \\
18 & isorhammetin-3-O-rutinoside [3] & 4.32 \(\pm\) 0.08 \({}^{\text{a}}\) & 0.78 \(\pm\) 0.64 \({}^{\text{b}}\) & 1.92 \(\pm\) 0.66 \({}^{\text{b}}\) & 22.14 & 0.016 \\
19 & isorhammetin-3-O-glucose [3] & 1.89 \(\pm\) 0.18 \({}^{\  
of new polyphenic compounds [47], which likely differ in composition and abundance between lavender species and cultivars. The overall amount of flavonoids was much higher in PUAE samples than in distillation wastewaters (Table 2), and the relative proportion of these compounds significantly varied between extracts (Table 3). Distillation wastewaters (LEACH) and PUAE samples (TWE and FWE) showed clearly different chromatographic profiles (Figure 3A-C), mostly due to differences in the relative amounts of flavonoids. As expected, hydroalcoholic extracts resulted in more concentrated flavonoid samples, likely due to the affinity of many of these compounds for solvents less polar than water [48].