Determination of pyrethroids in porcine tissues by matrix solid-phase dispersion extraction and high-performance liquid chromatography.

An effective matrix solid-phase dispersion (MSPD) extraction for determination of two pyrethroids (cypermethrin and deltamethrin) in porcine tissues (liver, muscle, heart and kidney) is described. A neutral alumina-based MPSD column was used for extraction of analytes. The high-performance liquid chromatography and ultraviolet detector was applied using a reverse-phase C(18) column and acetonitrile-water (85:15, v/v) was used as mobile phase. The good linear fit curve ranging from 0.05 to 50µgmL(-1) for cypermethrin (CM) and deltamethrin (DM) was obtained with a regression coefficient (r) of 0.999. Recoveries at 0.2 and 0.5µgg(-1) levels were between 83.5% and 109%. The limits of detection and quantification were: 0.01 and 0.026µgg(-1) for CM, 0.017 and 0.056µgg(-1) for DM, respectively. The proposed method was successfully applied to the determination of the pyrethroids in porcine tissues.