An ultrasonic assisted-ionic liquid based-liquid–liquid microextraction (UA-IL-DLLME) procedure for the determination by flame atomic absorption spectrometer (FAAS) of copper, nickel, and lead in different food samples has been established in the present study.
The effect of variables including pH, volume of ionic liquid (IL), volume of carbon tetra chloride (CCl4) and sonication time (St) were investigated using a full fractional design.