叶菌唑在小麦中的最终残留研究

Study on Residue of Metconazole in Wheat

为了评价叶菌唑在小麦上使用的安全性,开展了叶菌唑在小麦中的最终残留量研究。建立了分散固相萃取前处理方法,并采用液质联用测定叶菌唑在小麦中的残留量。结果表明,该测定方法具有较高的准确度和精密度,方法的相关系数为0.999。有效成分用量为540~810 g/hm^2,施药2~3次,末次药后14,21,28 d,叶菌唑在小麦麦粒和植株中的最终残留分别为未检出至0.16 mg/kg,未检出至1.1 mg/kg。

To eva luate the safety of metconazole used on wheat,trials were conducted to study the final residues.A method for determining metconazole was established by solid-phase dispersion extraction,using LC-MS/MS.The results showed that the accuracy and the precision of the method were high,the correlation coefficient was 0.999.When the active ingredient dosage was 540-810 g/hm^2,applied times were 2-3,the final residues in wheat and plant were no more than 0.16mg/kg and 1.1 mg/kg,respectively.