One-pot preparation of an acryloyled beta-cyclodextrin-silica hybrid monolithic column and its application for determination of carbendazim and carbaryl

This work describes, for the first time, an acryloyled beta-cyclodextrin hybrid monolith column was synthesized, under aqueous-phase conditions, and used for solid-phase microextraction of carbendazim and carbaryl. The monolithic column was characterized using scanning electron microscopy, nitrogen adsorption-desorption, thermogravimetric analysis and Fourier transform infrared spectroscopy, and used as the adsorbent for solid phase microextraction (SPME) of carbendazim and carbaryl. After optimization of the SPME conditions, a simple and sensitive SPME-HPLC method was developed for the determination of carbendazim and carbaryl in leafy vegetables. The method exhibited a good liner response in the range 5-400 mu g/kg (R-2=0.9994) for carbendazim and 10-400 mu g/kg (R-2=0.9996) for carbaryl, respectively. The limits of detection were 1.0 and 1.5 mu g/kg for carbendazim and carbaryl, respectively, in leafy vegetables. Recoveries ranged from 92.6% to 110.1%, and the relative standard deviations were less than 6.1%.