Multi-walled carbon nanotubes and matrix solid phase dispersion extraction-HPLC for the determination of acetamiprid residue in vegetables

With multi-walled carbon nanotubes (MWCNTs) as extractant, a method based on MSPD, HPLC had been developed for the determination of acetamiprid residue in vegetables.Samples were homogenized with industrial-grade carbon nanotubes and anhydrous magnesium sulfate in a mortar, packed into a cartridge, eluted by ethylacetate, and analyzed by HPLC.The acetamiprid residue was separated on a C 8 (3.0mm ×100mm, 1.8μm) column, with methanol-water (3∶2, v /v) as the mobile phase at the flow rate of 0.10 mL /min, then detected by UV detector at wavelength 210nm.The injection volume was 2.5μL, and the column temperature was 30℃.The results showed that vegetable samples recoveries were between 84.0% ~ 106.0%, with the relative standard deviations (RSDs) of 0.1%¹2.5%.And the detection lmit was 0.0085 mg /L.The method was simple, rapid, and accurate.