蔬菜、水果中农药多残留检测方法研究

Detection methods of pesticide residues in vegetables and fruits

中文关键词:  蔬菜  水果  多种农药残留  气相色谱-质谱联用法

英文关键词:vegetables  fruits  multiresidue pesticide  gas chromatography-mass spectrometry

中文摘要:

      目的 建立蔬菜、水果中6种农药的气相色谱-质谱联用分析方法。方法 通过对其前处理、仪器条件的优化, 以及灵敏度、精密度和基质适用性的研究, 建立一种优化后的多种农药多残留检测方法; 该方法采用超声波萃取, 凝胶渗透色谱净化(gel permeation chromatography, GPC), 气相色谱-质谱联用(gas chromatography-mass spectrometry, GC/MS)分析。结果 6种农药在0.2~1.0 mg/L浓度范围内线性良好, 相关系数大于0.995。加标回收率在70.2%~105.7%之间, 相对标准偏差(relative standard deviation, RSD)均≤7%。结论 本研究建立的方法操作简便、灵敏度高、重现性好, 可以用于日常的检验工作。

英文摘要:

      Objective To establish a method for the analysis of 6 pesticides in vegetables and fruits by gas chromatography-mass spectrometry (GC-MS). Methods An optimized method for detection of multiple pesticide residues was established by optimizing its pretreatment, instrument conditions, sensitivity, precision and matrix applicability. This method was characterized by ultrasonic extraction, gel chromatation chromatography (GPC) and gas chromatography-mass spectrometry (GC-MS). Results The six kinds of pesticides had good linear relationships in the range of 0.2?1.0 mg/L, and the correlation coefficients were greater than 0.995. The standard recovery were 70.2%?105.7%, with the relative standard deviations of lower than 7%. Conclusion The method developed in this study is simple, sensitive and reproducible, and which can be used in routine inspection.