小麦和土壤中烯唑醇残留消解动态分析及残留量膳食摄入评估  

Dissipation Analysis on Diniconazole in Wheat and Soil Under Field Conditions and Risk Assessment for Dietary Residue Intake

作　　者：吴绪金[1] 马婧玮[1] 黎妍妍 周玲[1] 汪红[1] 李业东[1] 张军锋[1] 李萌[1] 

机构地区：[1]河南省农业科学院农业质量标准与检测技术研究所/河南省粮食质量安全与检测重点实验室/农业部农产品质量安全风险评估实验室(郑州),河南郑州450002 [2]湖北省烟草科学研究院,湖北武汉430030

出　　处：《黑龙江农业科学》2016年第7期108-113,共6页Heilongjiang Agricultural Sciences

基　　金：河南省农业科学院科研发展专项资金资助项目(201412014)

摘　　要：为对烯唑醇在小麦生产上应用的安全性进行评价,通过建立烯唑醇在小麦籽粒、植株和土壤中的前处理和检测方法,对其进行定量分析;通过两年三地的残留试验,研究小麦籽粒、植株和土壤中烯唑醇的残留及消解动态,并对小麦中的残留量进行风险评估。结果表明：烯唑醇在小麦籽粒、小麦植株及土壤空白添加平均回收率为75%~98%,相对标准偏差为1.5%~3.5%,其最小检出量为1.0×10-13 g,在小麦籽粒、小麦植株及土壤中的最低检测浓度均为0.05mg·kg-1,该方法重现性好,准确度、精密度高,可满足烯唑醇在小麦上的残留分析要求。2014和2015年,河南、黑龙江和江苏三地烯唑醇在小麦植株和土壤中的消解半衰期分别为2.3~10.0d、13.0~16.0d;不同施药次数、施药量及采样间隔,烯唑醇在小麦籽粒中的最终残留量均小于等于0.18mg·kg-1。普通人群烯唑醇的国家估算每日摄入量是0.203 3 mg,占日允许摄入量的64.55%左右,按本试验方式进行施药,通常不会对一般人群健康产生不可接受的风险。To safety assessment of diniconazole in wheat and soil, provide an important scientific basis for the rational use of the pesticides in the wheat,Dissipation dynamics and residues of diniconazole in wheat,wheat plant and soil was reported under field conditions,the diniconazole was determined by gas chromatography using an electron capture detector （GC-ECD） ,and risk assessment of dietary intake of diniconazole residue in wheat. The fortified recoveried in wheat, wheat plant and soil were 75% - 98%, with the relative standard deviation of 1.5%-3.5% ,the limit of detection of the analytical method was 1.0× 10^-13 g ,and the limit of quantification were all 0.05 mg·kg^-1 in wheat, wheat plant and soil, the residue analysis method of wheat was sensitive,and simple,could met the demands of pesticide residue analysis. Residue analysis and dissipation of diniconazole in the field trials in Henan, Heilongjiang and Jiangsu province were investigated in the years of 2014 and 2015. The results showed that the half-lives of diniconazole in wheat plant and soil was 2.3-10 d and 13-16 d respectively; The final residues of diniconazole in wheat were all ≤0. 18 mg· kg^-1 in different dosage level, preharvest interval and application frequency. The general population of diniconazole national estimated daily intake was 0. 203 3 mg,accounting for about 64.55% of the acceptable daily intake（ADI）,spraying method according to the test did not produce an unacceptable risk to the general population health. This work would be provide guidance to the proper and safe use of this pesticide in agriculture.

关 键 词：小麦 残留 消解动态 半衰期 膳食摄入评估 健康 

分 类 号：S481.8[农业科学—农药学]