Abstract
A sensitive method for the determination of three new pesticides (trifludimoxazin, pyraziflumid and picarbutrazox) in cereals, vegetables and fruits samples has been developed using ultra-performance liquid chromatography/tandem mass spectrometry. The analytes were extracted using acetonitrile containing 1% formic acid, and then the extracts were purified using primary secondary amine and octadecylsilane. The compounds were eluted in < 3.5 min using an electrospray ionization source in positive mode. Good linearities (R2 > 0.9916) were acquired for the analytes in all matrices. The limit of detection and quantification were 0.05–5 μg kg−1 and 10 μg kg−1 for all the three target compounds, respectively. The recoveries were 74.4–105.1% and the relative standard deviations values were lower than 12.4% at three spiked levels (10, 100 and 500 μg kg−1). The results indicated that the method is reliable for monitoring the three pesticides in cereals, vegetables and fruits.
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