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. 2023 Sep 3;9(9):e19730. doi: 10.1016/j.heliyon.2023.e19730

Fig. 1.

Fig. 1

Chromatogram separation of phenolic compounds from standard phenolics and duckweed at a wavelength of 280 nm (1 = gallic acid, 2 = protocatechuic acid, 3 = caffeic acid, 4 = coumaric acid, 5 = ferulic acid, 6 = sinapic acid, and 7 = rosmarinic acid).