摘要
为减少苹果表面可能存在的氟啶虫酰胺农药残留,利用大气压低温等离子体技术对氟啶虫酰胺进行降解处理,设置功率、极距以及时间等因素,以未经处理过得氟啶虫酰胺样品作为对照,通过液相色谱–串联质谱法检测处理前后样品的农药残留量,采用3因素3水平的正交试验方式,优化降解工艺。结果表明:0.2 mg·kg^(-1)氟啶虫酰胺标准品在功率为5 kW、时间为15 s、极距为4 cm的放电条件下进行处理,降解效率最佳为91.30%。在该降解条件下,采用涂布方法和浸泡方法进行验证,苹果表面氟啶虫酰胺降解率分别为72.10%和80.30%,浸泡法、涂布法的样品含水率损失分别为13.95%和17.15%,且样品表面均无明显变化。
In order to reduce the potential pesticide residues of flonicamid on apple surface,the atmospheric low temperature plasma technology was used to oxidize and degrade flonicamid.Different factors such as power,distance and exposure time were set and studied.In the experiment,the untreated samples were used as control.Gas Chromatography-Mass Spectrometer(GC-MS)was used to detect the pesticide residues in samples before and after treatment,and three factors and three levels of orthogonal test was conducted to optimize degradation conditions.The results showed that the best degradation efficiency of 0.2 mg·kg^(-1) flonicamid was 91.30%with the discharge conditions of 5 kW power,15 s exposure time and 4 cm electrode distance.Under this degradation condition,the degradation rate of flonicamid on apple surface was 72.10%and 80.30%by using coating method and soaking method,respectively.The water loss rate of soaking method and coating method were 13.95%and 17.15%,respectively.Furthermore,the surface of samples has no obvious change under the two methods.
作者
徐毓谦
马东硕
孙少忆
赵芳芳
刘贵珊
孙运金
XU Yuqian;MA Dongshuo;SUN Shaoyi;ZHAO Fangfang;LIU Guishan;SUN Yunjin(School of Food & Wine,Ningxia University,Yinchuan 750021,China;Plasma Engineering Center, Capital Agricultural Product Safety Industrial Technology Institute,Beijing University of Agriculture,Beijing 102206,China;School of Agriculture,Ningxia University,Yinchuan 750021,China)
出处
《河南农业大学学报》
CAS
CSCD
2021年第2期321-327,共7页
Journal of Henan Agricultural University
基金
国家自然科学基金项目(31972144)
北京市教育委员会科技计划一般项目(KM201910020003)。
