【摘要】 研究了啶虫脒在梨中的残留分析方法及消解动态和最终残留量。啶虫脒经乙酸乙酯∶丙酮(1∶1,V/V)提取,用弗罗里硅土净化、浓缩、定容后,用带ECD检测器的气相色谱仪进行测定。啶虫脒最低检出量为1.0×10-12 g,最低检出浓度为0.001 mg/kg,回收率在82.1%～99.7%之间,相对标准偏差为2.5%～4.1%。啶虫脒在梨中的消解半衰期分别为2.8 d(滨州)和4.8 d(烟台),属于易降解农药(T1/2<30 d)。啶虫脒在梨中的最终残留量分别为0.010、0.028 mg/kg(烟台)和0.025、0.045 mg/kg(滨州)。更多还原

【Abstract】 The analyzing method for acetamiprid residue,degradation dynamics and final residues in pears were studied.The acetamiprid was extracted from pears with the mixture of acetic ester and acetone(1 ︰ 1,V/V),and then purified by Florisil,concentrated and volumed.It was determined by GC with ECD detector.The results showed that the minimum detectable amount was 1.0 × 10-12 g;the minimum detectable concentration was 0.001 mg/kg;the recovery rate ranged from 82.1% to 99.7% with the relative standard deviation between 2.5% and 4.1%.The half life was 2.8 days in Binzhou area and 4.8 days in Yantai area respectively,which showed that acetamiprid was an easily degradable pesticide(half life shorter than 30 days).The final residues of acetamiprid in pears after sprayed for 21 days under the two concentrations were 0.010 mg/kg and 0.028 mg/kg in Yantai area,and 0.025 mg/kg and 0.045 mg/kg in Binzhou area.更多还原