[Determination of carbendazim residues in by high performance liquid chromatography-triple quadrupole mass spectrometry].

A novel method based on high performance liquid chromatography-triple quadrupole mass spectrometry (HPLC-MS/MS) was established for the determination of carbendazim in . The sample was extracted by ethyl acetate under alkaline conditions and centrifuged. The supernatant was concentrated by rotary evaporation, redissolved, and then enriched and purified on a mixed-mode cation exchange solid phase extraction column (MCX). A C18 column was used with acetonitrile and water as mobile phases in a gradient elution. Ionization was performed using an electrospray positive ion source (ESI), and detection was achieved by MS/MS in multiple reaction monitoring (MRM) mode. The linearity for carbendazim was good in the range of 0.5-50.0 μg/L; the linear equation was =0.19988+0.01842; and the correlation coefficient () was 0.9985. The limit of detection (LOD) and limit of quantification (LOQ) were 0.25 μg/kg and 0.50 μg/kg, respectively. At spiked levels of 0.5, 1.0, 5.0, and 50.0 μg/kg, the recoveries ranged from 83.9% to 105.5%, and the relative standard deviation ranged from 1.1% to 3.2%. This method is simple and effective for the determination of carbendazim residues in .