摘要
在北京市和山东大学郊区进行了戊唑醇在苹果上的残留动态和最终残留试验,用HPLC测定了其残留量。戊唑醇的最低检出量为4.0×10-11g,在苹果和土壤中的最低检出质量分数均为0.002mg/kg。在苹果和土壤中的平均回收率为85.6%～102.2%,变异系数为2.85%～9.47%,符合农药残留分析的要求。结果表明,戊唑醇在苹果上的半衰期为10.8～12.5d,在土壤中的半衰期为9.2～16.4d。按推荐剂量和推荐剂量两倍施用的情况下,戊唑醇在苹果中的残留量为0.058～0.230mg/kg,土壤中的残留量为0.109～1.371mg/kg。
Residue dynamics and final residue of tebuconazole in apple and soil were studied by HPLC. Residues of tebuconazole were extracted from apple and soil with menthol, concentrated and determined by HPLC with UV detector. The lowest detection limit of instrument for tebuconazole was 4.0 × 10^-11 g. The limit of quantification was 0.002 mg/kg for apple and soil. The average recovery was 85.6 to 102.2%, and coefficient of variation was 2.85 to 9.47%, respectively. The results showed that half-life of tebuconazole in apple and soil were 10.8 to 12.5 days and 9.2 to 16.4 days, respectively. The fungicide of tebuconazole was applied as foliage spray according to the recommended dosage and the twice-recommended dosage, the final residue ranged from 0.058 to 0.230 mg/kg in apple, 0.109 to 1.371 mg/kg in soil, respectively. It did not exceed maximum residue limit 0.5 mg/kg established by EU in apple. According to the results, we recommend that 43% Folicur SC was applied as foliage spray three times at a dosage of 3000 dilution factor for apple with a safe interval of 28 days from harvest.
出处
《农药》
CAS
北大核心
2007年第3期194-196,共3页
Agrochemicals
关键词
戊唑醇
残留
消解
苹果
tebuconazole
residue
degradation
apple
