A number of studies on solvent-free
in situ microwave-generated hydrodistillation highlighted
the efficiency and the wide applicability of this
technique. We have recently compared the ability of traditional
hydrodistillation and SFME to extract three common mint species
(Mentha spicata L. var. rubra, Mentha spicata L. var. viridis and Mentha
x piperita L.) using either fresh plant or rehydrated material
(Orio et al., 2012).