Fig. 7From: Development of dispersive solid-phase microextraction coupled with high-pressure liquid chromatography for the preconcentration and determination of the selected neonicotinoid insecticidesThree-dimensional contour plots of a acetamiprid (ACT), b imidacloprid (IMD), c thiacloprid (TCL) and d clothianidin (CLD) describing the combined interactive effects of investigated factors (EV eluent volume, MA mass of adsorbent) on the analytical responseBack to article page