4.2.4. Re-using
PAHs in edible oils are formed during purification process and
cooking. Used edible oils contained 2.8–11.5 lg/kg naphthalene,
5.4–11.5 lg/kg phenanthracene, 9.4–17.2 lg/kg fluoranthene,
0.5–2.2 lg/kg BaP and 17.7–54.0 lg/kg IP which were significantly
higher compared to other refined oils owing to its usage in deep
frying of food items like meat and thus the reuse of oils should
be properly monitored for safety purposes (Payanan,
Leepipatpiboon, & Varanusupakul, 2013).