【摘要】 以烯丙基氧七元瓜环（Q7-OCH₂CH=CH₂）和端羟基聚二甲基硅氧烷（OH-PDMS）为固定相,γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH570）为偶联试剂,利用溶胶-凝胶方法和自由基交联技术首次制备了PDMS/Q7-OCH₂CH=CH₂涂层的固相微萃取纤维,建立了PDMS/Q7-OCH₂CH=CH₂SPME纤维-气相色谱（GC）/氢火焰离子化检测器（FID）对蔬菜中10种有机氯、有机磷农药残留同时检测的分析方法。结果显示,10种农药的检出限（LOD）为0.01～0.08 mg/kg,定量下限（LOQ）为0.03～0.26 mg/kg,富集倍数为14～67倍。低、中、高3个水平下的平均回收率（n=3）为61.3%～120%,日内及日间精密度（RSD）为4.6%～9.9%（n=5,50 mg/kg）。方法灵敏、简便,可满足蔬菜中有机氯、有机磷农残同时测定的要求。更多还原

【Abstract】 A gas chromatography with flame ionization detector（GC/FID）was developed for the determination of ten organochlorine and organophosphorus pesticide residues in vegetable samples based on a polydimethylsiloxane（PDMS）/allyl-o-cucurbit[7]uril（Q7-OCH₂CH=CH₂）coated solidphase microextraction（SPME）fiber.The PDMS/Q7-OCH₂CH=CH₂coated SPME fiber was fabricated with Q7-OCH₂CH=CH₂and hydroxyl-terminated polydimethylsiloxane（OH-PDMS）as stationary phases andγ-methacryloxypropyltrimethoxylsilane（KH570）as bridge reagent by sol-gel method and cross-linking technique.The limits of detection of the developed method were in the range of 0.01-0.08 mg/kg for the target pesticide residues,and the limits of quantitation ranged from 0.03 mg/kg to 0.26 mg/kg with an enrichment factor of 14-67 fold.The mean recoveries（n=3）at low,medium and high three spiked levels ranged from 61.3%to 120%,with intra-percision and inter-precision both in the range of 4.6%-9.9%（n=5,spiked 50 mg/kg）.The proposed method was simple and sensitive,and was suitable for the simultaneous analysis of organochlorine and organophosphorus pesticide residues in vegetables.更多还原