Acetone (boiling point = 56 C, density = 0.79 g cm3
, 99% purity),
ethanol (boiling point = 78 C, density = 0.79 g cm3
, 99% purity),
isopropanol (boiling point = 82 C, density = 0.79 g cm3
, 99% purity)
and hexane (boiling point = 69 C, density = 0.66 g cm3
, 99%
purity) were supplied by F-maia (São Paulo, Brazil).
2.3. S