小麦及其加工产品中农药残留分布特征

Distribution Characteristics of Pesticide Residue in Wheat and Processing Products

分析不同类型小麦制粉工艺产品中农药残留分布特征,为小麦制品农药残留含量的控制提供数据支持。结果表明,小麦籽粒中杀菌剂和杀虫剂是检出率较高的2种药剂。比较了2种不同加工方式的小麦籽粒加工产品中农药残留的分布特征,布拉班德实验磨的加工产品中农药残留浓度从高到低依次为麸皮、粗粉和小麦粉;布勒实验磨的小麦加工产品中,呈现出2种不同的分布特征,其中甲基毒死蜱、马拉硫磷和甲基嘧啶磷在三心粉中含量占比最高,而氟虫腈和甲基异柳磷在麸皮和一皮粉中占比较高。不同农药残留在各组分中分布存在较大差异的主要原因可能是由于农药之间的物理化学性质存在较大差异,土壤农药残留污染程度及植物吸收规律不一致导致。

The distribution characteristics of pesticide residues in different types of wheat flour products were analyzed to provide data support for the controling pesticide residues in wheat products.The results showed that fungicides and insecticides were two kinds of pesticides with high detection rate in wheat kernel.The distribution characteristics of pesticide residues in wheat grain products processed by two different processing methods were compared.The samples with highest to lowest concentration of pesticide residues were bran,coarse flour and wheat flour in order for products processed by the Brabender experimental mill.There were two different distribution characteristics in the wheat processed products from Buhler experimental mill,among which chlorpyrifos methyl,malathion and pyrimiphos methyl were the highest.Fipronil and isophosphorus methyl were the largest in bran and powder.The main reason for the significant differences in the distribution of different pesticide residues in each component may be due to the significant differences in the physical and chemical properties of pesticides,as well as inconsistent levels of soil pesticide residue pollution and plant absorption patterns.