31 samples of oils used for frying, selected at different stages of the Fry
ing process, have been examined by analyzing of the polar compounds and by
employing two rapid colorimetric kits (Oxifrit-Test e Fritest).
The results have made clear that even the Fast and easy to use colorimetric
kits can be used effectively in the analysis, in order to have an immediat
e and efficient picture of the alteration of the oils.