Combination of solid-phase extraction and dispersive liquid–liquid microextraction for detection of cypermethrin and permethrin in environmental water

A new solid-phase extraction and dispersive liquid–liquid microextraction (SPE-DLLME) method coupled with gas chromatography electron capture detection (GC-ECD)was established for the detection of cypermethrin and permethrin in river water. The samples were firstly extracted using a large-volume SPE procedure and the eluents of SPE were further purified and enriched by the following DLLME. Good linearity was observed in the range of 0.015–3.87...