Determining the solute-solid interactions in phytoextraction

It was shown that artemisinin in ethanolic extracts did not adsorb onto the plant material, while for hexane and hexane/ethyl acetate linear adsorption isotherms were determined. The measured solute-solid interactions of the steviol glycosides could be described by Langmuir adsorption isotherms. Investigating the kinetics of adsorption by applying the second experimental procedure, it was shown that the adsorption equilibria of the steviol glycosides were not instantaneously reached.