Ultrasound-assisted extraction of flavonoids from Cercis chinensis flowers using deep eutectic solvents: optimization, characterization, kinetics and bioactivity.

A well-fitted quadratic model was established through multiple regression analysis with Design-Expert software, as represented by the following second-order polynomial equation: Y = − 940.3875 + 16.5837A + 31.7875B + 15.59C–0.2145AB–0.055AC + 0.025BC–0.1146A 2 –0.4025B 2 –0.22638C 2 Analysis of variance revealed that the model exhibited a highly significant difference with a ( P = <0.0001, while the lack-of-fit term was not significant ( P = 0.5349), indicating good model fit.

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