Fig. 8From: MgO-ZnO/carbon nanofiber nanocomposite as an adsorbent for ultrasound-assisted dispersive solid-phase microextraction of carbamazepine from wastewater prior to high-performance liquid chromatographic detectionResponse surface and contour plots of the combined effects of a mass of adsorbent and pH, b eluent volume and pH, and c eluent volume and mass of adsorbentBack to article page