土壤和水中氰氟草酯及其代谢物的分析方法
Analytical Methods for Cyhalofop-butyl and Its Metabolites in Soil and Water
-
摘要: 建立了一种简易而实用的残留分析方法 ,用于检测土壤与水中氰氟草酯及其 3种代谢产物 ,即(R)-2-4-(4-氰基-2-氟苯氧基)苯氧基-丙酸(ACID)、 (R)-2-4-(4-氨基甲酰基-2-氟苯氧基)苯氧基-丙酸(AMIDE)、(R)-2-4-(4-羧基-2-氟苯氧基)苯氧基-丙酸 (DIACID)。该方法仅用高效液相色谱法的梯度洗脱程序即可将 4种化合物有效分离 ,省去了需将氰氟草酯 (母体)衍生化反应再用气相色谱法检测这一复杂步骤。同时 ,该方法的添加回收率高。较低的 p H值对提高 4种化合物的提取效率很重要。Abstract: A relatively simple and less expensive method is proposed for the determination of cyhalofop butyl (XDE 537) and its metabolites: R (+)-2-4-(2-fluoro-4-cyanophenoxy)-phenoxy propanoic acid (ACID); R (+)-2-(4-carboxyl-2-fluoro-4-cyanophenoxy)-phenoxy propanoic acid (DIACID); and 2-propanoic-acid-(DIACID); and 2-4-(4-carbamoyl-2JP-fluorophenoxy)-phenoxy propanoic acid (AMIDE). Conversion of the parent compound to its aryl/alkyl/or halide derivative for determination by GC was found unnecessary. Only HPLC was used and under gradient elution all the four compounds separated well. Good recoveries were obtained with the fortified soil and water samples. Low pH was important for the extraction of the four components. propanoic acid (AMIDE). Conversion of the parent compound to its aryl/alkyl/or halide derivative for determination by GC was found unnecessary. Only HPLC was used and under gradient elution all the four compounds separated well. Good recoveries were obtained with the fortified soil and water samples. Low pH was important for the extraction of the four components.
下载: