Naphyrone: analytical profile of the new "legal high" substitute for mephedrone.

Naphyrone sample diluted in methanol was analysed with a previously described method (9) with a Dionex (Camberley, U.K.) HPLC system (P580 binary pump, STH 585 column oven, GINA 50 autosampler and a PDA-100 diode array detector). Data acquisition was by a Dionex Chromeleon Version 6.8 software package with the DAD recording spectral data between 200 nm and 595 nm. Wavelengths of 210 nm and 220 nm were used for analysis. Method conditions are described in table 1. Chromatogram of the elution of naphyrone and its UV spectrum are shown in figure 1 and 2.