Abstract:

A method was developed for the simultaneous determination of 19 carbamate pesticides residues in spinach, cucumber, scallion, fungus, mushroom, agaric and carrot by liquid chromatography tandem mass spectrometry(UPLCMS/MS) combined with isotope internal standard method. The vegetable and mushroom samples were extracted with V(acetone)∶V(acetonitrile)=85∶15 then purified by gel permeation chromatography(GPC) or solid phase extraction(SPE). The recoveries ranged from 70.1% to 95.7% with the cleaning method of GPC and from 70.2% to 94.9% with the cleaning method of primarysecondary amine PSA SPE. The limits of detection(LOD) were 1×10-5 g/kg. The method showed a good linear relationship with the correlation coefficients over 0.99.This method is practical, accurate and highly sensitive.

Key words: UPLC-MS/MS, vegetable, mushroon, carbamate