白菜中吡虫啉、啶虫脒残留去除方法研究

Study on Removal Method of Imidacloprid,Acetamiprid Residue in Cabbage

模拟菜农用药情况,将白菜浸泡在吡虫啉和啶虫脒水溶液中制备载药白菜样品,用各种清洗方法清洗载药菜样,用高效液相色谱检测,计算吡虫啉、啶虫脒残留去除率,同时测定维生素C的损失情况。结果表明:不同温度清水浸泡能够去除一部分吡虫啉和啶虫脒残留,但是去除率与水温变化不呈正相关性。在浸泡的基础上,辅以搅动、臭氧、添加洗洁精都能够提高白菜中吡虫啉和啶虫脒的去除率,洗洁精清洗去除率最高,但是考虑到残留问题以及维生素C的损失情况,不建议用洗洁精清洗。超声清洗对白菜中吡虫啉和啶虫脒的去除率以及维生素C损失率与超声时间不具有正相关性。

To preparing drug loaded samples,the cabbage was soaked in imidacloprid and acetamiprid aqueous solution,simulated farmers use pesticide scenarios,with all kinds of cleaning methods for loading samples,measured by HPLC,calculation of imidacloprid and acetamiprid residue removal rate,loss of simultaneous determination of vitamin C. The results showed that different temperature water immersion can remove part of imidacloprid and acetamiprid residues,but the removal rate and water temperature changes was no positive correlation between. On the basis of soaking,supplemented by churning,ozone,add detergent can improve the cabbage in imidacloprid and acetamiprid removal rate,detergent removal rate was the highest,but taking into account the residue in food and vitamin C losses was not recommended use detergent to wash. Ultrasonic cleaning on cabbage in imidacloprid and acetamiprid removal rate and vitamin C loss ratio and ultrasonic time does not have a positive correlation.