文章摘要
引用本文:刘 薇,蔡艺敏,张 兰.分散液-液微萃取与气相色谱-质谱联用检测白菜汁和橙子汁中11种农药残留[J].福州大学学报(自然科学版),2013,41(6):1115~1120
分散液-液微萃取与气相色谱-质谱联用检测白菜汁和橙子汁中11种农药残留
Determination of 11 pesticide residues in the Chinese cabbage and Fragrant citrus fruit using dispersive liquid-liquid microextraction coupled with gas chromatography/mass spectrometry
  
DOI:10.7631/issn.1000-2243.2013.06.1115
中文关键词: 分散液-液微萃取  气相色谱-质谱  农药残留  蔬菜汁  水果汁
英文关键词: dispersive liquid-liquid microextraction  gas chromatography-mass spectrometry  pesticide residues  vegetable juice  fruit juice
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作者单位
刘 薇 福州大学食品安全分析与检测教育部重点实验室福建 福州 350116福州大学测试中心福建 福州 350116 
蔡艺敏 福州大学食品安全分析与检测教育部重点实验室福建 福州 350116 
张 兰 福州大学食品安全分析与检测教育部重点实验室福建 福州 350116福州大学测试中心福建 福州 350116 
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中文摘要:
      建立了基于分散液-液微萃取的气相色谱-质谱(GC-MS)联用对白菜汁、橙汁中11种痕量农药的富集和检测方法. 实验优化了各种分散液-液微萃取的影响因素,最终选择萃取剂为20μL 四氯化碳,分散剂为1.5mL 乙腈. 在最佳条件下各农药检出限低于0.25μg·L-1,富集因子最高为636倍. 除氟硅唑和稻丰散回收率偏低外,大部分农药在白菜汁中的中、高浓度平均加标回收率在62.8%~119.7%,RSD在 2.66%~15.62%(n=3);在橙汁样品中的中、高浓度平均加标回收率在67.6%~112.8%,RSD在6.64%~15.98% (n=3). 实验结果表明,分散液-液微萃取技术具有操作简单、快捷、富集因子高、精密度高等特点,与GC-MS联用是检测蔬菜及水果汁中痕量农药残留的一种方便、高效的方法.
英文摘要:
      Based on the sample preparation method of dispersive liquid-liquid microextraction(DLLME) and gas chromatography/mass spectrometry(GC-MS),a method to determine trace amount of pesticide residues in the orange juice and cabbage juice was established. Several factors were optimized by DLLME experiments. Carbon tetrachloride(20μL) was selected as extraction solvent,and acetonitrile(1.5mL) was selected as dispersive solvent. Under the optimized conditions,the linear regression equations of the pesticide residues in the deionized water were described,and the limits of detection were below than 0.25μg·L-1. The enrichment factors were between 231 and 636. The method was used for the pesticide residues in the orange juice(diluted) and cabbage juice(diluted). Except for phenthoate and flusilazole,the average recoveries of pesticide residues in cabbage juice were between 62.8%~119.7%,the RSDs were between 2.66%~15.62% (n=3);the average recoveries of pesticide residues in orange juice were between 67.6%~112.8%,the RSDs were 6.64%~15.98%(n=3). The results show that DLLME method has the advantages of simple and fast operation,high accumulation rate and high degree of acccuracy. This technique combined with GC-MS would be a convenient and effective method to analyze and determine trace amount of pesticide residues in juices of orange and cabbage.
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