The potential of carbon nanocones/disks as sorbent material in solid-phase extraction (SPE) procedures has been evaluated. For this aim, a model analytical problem, the determination of chlorophenols in water samples, was selected. An accurately weighed amount of 20mg of purified carbon nanocones/disks was packed in 3mL commercial SPE cartridges. Once conditioned, up to 8mL of water samples can be preconcentrated without analyte losses. The chlorophenols were eluted by using 200μL of hexane. Aliquots of 2μL of the organic extract were injected in the gas chromatograph–mass spectrometer for separation and quantification. The purification of the commercial nanocones/disks to reduce the presence of amorphous carbon has been successfully achieved by heating the carbon nanocones/disks at 450°C for 20min. Detection limits of chlorophenols were in the range 0.3–8ngmL⁻¹ by using 2mL of sample. Moreover, excellent average recovery values (98.8–100.9%) have been obtained after the analysis of water samples from different nature. Finally, the performance of the carbon nanocones/disks as sorbent material has been compared with that of multiwalled carbon nanotubes, providing the former better results under the experimental conditions assayed.