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.

使用超高效液相色谱/串联质谱法开发了一种用于测定谷物、蔬菜和水果样品中三种新农药（三氟嘧啶、吡唑嗪和吡卡布唑）的灵敏方法。分析物用含 1% 甲酸的乙腈提取，然后用伯仲胺和十八烷基硅烷纯化提取物。使用正离子模式的电喷雾电离源在 < 3.5 分钟内洗脱化合物。所有基质中的分析物都获得了良好的线性 (R ² > 0.9916)。检测限和定量限分别为 0.05 - 5 μg kg ^-1和 10 μg kg ^-1分别为所有三个目标化合物。在三个加标水平（10、100 和 500 μg kg ^-1）下，回收率为 74.4 - 105.1%，相对标准偏差值低于 12.4% 。结果表明，该方法对谷物、蔬菜和水果中的三种农药进行监测是可靠的。