The bread samples for recovery tests were prepared using a
bread machine (Severin, mod. BM 3981) to knead 400 g of flour
type ‘‘0”, 280 g of tap water, 16 g of extra virgin olive oil and 4 g
of yeast. The mineral oil standard was added to the extra virgin
olive oil used to make the bread. After kneading and leavening,
the dough was baked according to the machine program. Two
bread samples were prepared: one with the unspiked extra virgin
olive oil and the other with the same oil spiked with a known
amount of printing ink solvent and paraffin oil.