摘要
建立了多种水果和饮料中氟嘧菌酯和嘧螨酯残留的超高效液相色谱测定方法。样品用乙酸乙酯-环己烷（体积比为1∶1）超声波萃取,凝胶渗透色谱法净化,超高效液相色谱-二极管阵列检测器检测,外标法定量。采用BEHC18色谱柱（50mm×2.1mm,1.7μm）,流动相为水-乙腈（体积比为3∶7）,流速为0.3mL/min,柱温为40℃,紫外检测波长为251nm。实验结果表明：氟嘧菌酯和嘧螨酯在0.05~2mg/L范围内线性关系良好（r〉0.999）,在不同的基质中添加3个浓度水平（0.01,0.05,0.1mg/kg）的氟嘧菌酯和嘧螨酯,两者的回收率均在82.60%~101.11%之间,相对标准偏差为5.4%~15.3%;检出限不大于6μg/kg,定量限不大于20μg/kg。
A method was developed for the determination of fluoxastrobin and fluacrypyrim residues in fruits and beverages by ultra performance liquid chromatography with photo-diode array（UPLC-PDA） detection.The sample was extracted with ethyl acetate-cyclohexane（1∶1,v/v） by ultrasonic,cleaned-up by gel permeation chromatography（GPC）,and then determined by UPLC-PDA.The quantification was performed by external standard.A BEH C18 colunm（50 mm×2.1 mm,1.7 μm） was used,and water-acetonitrile（3∶7,v/v） was used as mobile phase at a flow rate of 0.3 mL/min.The column temperature was set at 40 ℃,and ultraviolet absorption wavelength was set at 251 nm.The calibration curves were linear between the peak area and the concentration in the range of 0.05-2 mg/L for fluoxastrobin and fluacrypyrim,the correlation coefficients were greater than 0.999.The average recoveries spiked in fruit and beverage matrices at the three concentration levels of 0.01,0.05,0.1 mg/kg ranged from 82.60% to 101.11% with the relative standard deviations of 5.4%-15.3%.The limits of detection（LOD） were not greater than 6 μg/kg and the limits of quantification（LOQ） were not greater than 20 μg/kg in fruit and beverage matrices for fluoxastrobin and fluacrypyrim.
出处
《色谱》
CAS
CSCD
北大核心
2009年第2期201-205,共5页
Chinese Journal of Chromatography
基金
国家认证认可监督管理委员会2007年检验检疫行业标准研制项目(No.2007B865)
关键词
超高效液相色谱
凝胶渗透色谱
氟嘧菌酯
嘧螨酯
农药残留
水果
饮料
ultra performance liquid chromatography（UPLC）
gel permeation chromatography（GPC）
fluoxastrobin
fluacrypyrim
pesticide residues
fruit
beverage
