Nguyen, M. T., Vu, D. T., Lorenz, H., Horosanskaia, E., & Seidel-Morgenstern, A.(2017). Purifying rutin involves forming suspension of rutin-containing plant extract (type I) in ethanol, heating, separating insoluble impurities, adding rutin crystal germ type II to solution, stirring and separating solid-liquid phase.