中文摘要：

建立了西瓜样品中喹啉铜农药残留的超高效液相色谱分析方法.样品用4％冰醋酸超声振荡提取,提取液经阳离子交换固相萃取小柱净化后,用1％醋酸铵-甲醇洗脱,洗脱液经氮气吹干后用流动相定容.试样采用Vneusil MP C18色谱柱（150 mm ×4.6 mm,5μm）进行分离,流动相为0.1％三氟乙酸-乙腈（95＞5）.结果表明,喹啉铜在0.05～10 μg/mL浓度范围内线性关系良好,相关系数不低于0.999 9.在0.05～2.0 mg/kg加标浓度范围内的平均回收率为72.3％ ～84.1％,相对标准偏差为2.1％～3.8％,方法的检出限为0.024 mg/kg.

英文摘要：

A novel method for the determination of copper 8-quinolinolate by ultra-performance liquid chromatography（UPLC） was developed.The sample was extracted with 4％ acetic acid solution and cleaned up with a Cleanert PCX cartridge.The cartridge was eluted with 1％ ammonium acetate-methanol.The elution was evaporated to near dryness under a stream of nitrogen,and dissolved by mobile phase.The target compound was separated on a Vneusil MP C18 column（150 mm ×4.6 mm,5 μm） using 0.1％ TFA-acetonitrile （95 ∶ 5） as mobile phase.The method had a good linear correlation（r≥0.999 9）in the range of 0.05-10 μg/mL.The average recoveries of copper 8-quinolinolate at a spiked range of 0.05-2.0 mg/kg were in the range of 72.3％-84.1％ with relative standard deviations（RSDs） of 2.1％-3.8％.The limit of detection（LOD） was 0.024 mg/kg.