不同清洗方式对香菇中毒死蜱残留去除效果的研究

采用气相色谱法,研究了不同清洗方式对香菇中毒死蜱残留的去除效果。结果表明,日常使用的清洗方式,均可降低香菇中毒死蜱残留量,但去除效果存在差异,香菇中毒死蜱残留去除率在0.32%～100.00%间。采用洗涤剂清洗,对于香菇中毒死蜱残留总体去除效果最好,即使对高残留量样品(64.49 mg.kg-1)也具有较好的去除效果,去除率达54.72%～56.69%。采用流动的自来水冲洗,对于较低残留量的样品(低于3.91 mg.kg-1),去除效果最好,而对高残留量样品,去除率则低于30%。采用相同方式处理,香菇中毒死蜱去除率随着初始残留量的增大而减小;除盐水浸泡处理外,随着处理时间的延长,残留去除率增加。研究结果对于去除香菇等食用菌农药残留量,提高食用安全性,具有指导意义。

Removal of chlorpyrifos residue in Lentinus edodes by different washing ways

Samples of Lentinus edodes,a kind of mushroom,were exposed to insecticide chlorpyrifos to study the effects of washing methods on the removal of the residues.The results indicated that different washing ways led to 0.32%～100.00% removal of pesticide residues.In most cases,washing operations led to a gradual decrease in residue levels,particularly washing with detergents or running tap water.The results indicated that washing with detergents could remove 54.72%～56.69% of pesticide residues at level of 64.49 mg/kg.The chlorpyrifos at level of 0.39 mg?kg-1 was completely removed after washing with running tap water,detergents or mild water(below LOD of 0.0016 mg?kg-1).The effect of washing with running tap water was not good when initial residue of chlorpyrifos was more than 3.91 mg?kg-1,but it was better with salt solution.