蔬果中12种残留农药的亚临界水萃取研究

利用亚临界水可以定量萃取基质中绝大部分化合物的特点,借助加速溶剂萃取仪(ASE)将亚临界水萃取与固相吸附联用,通过在ASE萃取池中填加C18吸附层的方式改进了萃取吸附模式,优化了萃取温度,研究了亚临界水在萝卜、香瓜、苹果和白菜等蔬果基质中对异稻瘟净等12种农药的萃取效果,用气相色谱-串联质谱法(GC-MS/MS)进行检...

Study on Subcritical Water Extraction of 12 Pesticides Residues in Vegetables and Fruits

Using the characteristics that subcritical water can quantitatively extract a wide variety of organic solutes from different matrixes,12 pesticides were extracted from radish,cantaloupe,apple and cabbage by subcritical water extraction combined with solid phase adsorption in accelerated solvent extractor after adding C18 padding in the cell.The extraction conditions were optimized.The determination of 12 pesticides was performed by gas chromatography-tandem mass spectrometry(GC-MS/MS).The result indicated that the limits of quantitation were in the range of 0.025-0.050 mg/kg,and the recoveries of 12 pesticides from fruits and vegetables samples at spiked level of 0.05 mg/kg were in the range of 62%-110% with RSDs less than 10%.