In-situ metathesis reaction combined with ultrasound-assisted ionic liquid dispersive liquid-liquid microextraction method for the determination of phenylurea pesticides in water samples

► An in-situ UA-IL-DLLME was used as a fast, simple, sensitive, and environment friendly sample preparation technique. ► Five phenylurea pesticides were target analytes. ► Experimental factors were assessed and optimized with the aid of response surface methodology. ► EFs and LODs are comparable with other methods.