For the extraction, methanol Super Purity from Romil was used
(Cambridge, UK). Basic and neutral alumina activity grade I and
octadecyl functionatlised silica gel (C18), Florisil and silica gel were
purchased from Sigma (St. Louis, MO, USA). All sorbents were
previously activated in a muffle furnace for 12 h at 130 C (silica gel),
350 C (basic and neutral alumina) and 450 C (Florisil). Then, all of
them were 5% water deactivated and shaken by hand for 30 min.
For the extraction, methanol Super Purity from Romil was used
(Cambridge, UK). Basic and neutral alumina activity grade I and
octadecyl functionatlised silica gel (C18), Florisil and silica gel were
purchased from Sigma (St. Louis, MO, USA). All sorbents were
previously activated in a muffle furnace for 12 h at 130 C (silica gel),
350 C (basic and neutral alumina) and 450 C (Florisil). Then, all of
them were 5% water deactivated and shaken by hand for 30 min.
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