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[目的]建立气相色谱(GC)检测田水和土壤样品中咪鲜胺锰盐残留量的方法。研究咪鲜胺锰盐在田水和土壤中的消解动态。[方法]样品经超声处理后,用丙酮提取,二氯甲烷液液分配转移,残留物在吡啶盐酸盐中,210℃条件下密封2 h,生成的2,4,6-三氯苯酚经乙酸乙酯萃取后,用GC-ECD检测。[结果]田水和土壤中的平均添加回收率分别为73.6%~117.6%、70.1%~92.8%,变异系数分别为4.4%~19%、3.8%~14.2%,仪器最小检出量为7.6×10-14 g,田水和土壤中最低检出质量浓度均为0.01 mg/L。[结论]方法简便、快速,准确度高,重现性好。咪鲜胺锰盐在田水和土壤中易降解。
[Objective] The research aimed to establish a method for the determination of prochloraz residue in field and soil samples by gas chromatography (GC). Study on the digestion of prochloraz manganese salt in field water and soil. [Method] After the sample was sonicated, it was extracted with acetone and the liquid dichloromethane was partitioned and transferred. The residue was sealed in pyridine hydrochloride at 210 ℃ for 2 h. The produced 2,4,6-trichlorophenol was After extraction with ethyl acetate, detection by GC-ECD. [Result] The average recovery rates in field water and soil ranged from 73.6% to 117.6% and from 70.1% to 92.8%, respectively. The coefficients of variation were 4.4% -19% and 3.8% -14.2%, respectively. The minimum detectable volume was 7.6 × 10-14 g, the lowest detected concentration in field water and soil was 0.01 mg / L. [Conclusion] The method is simple, rapid, accurate and reproducible. Prochloraz manganese salt in field water and soil degradation.