固相微萃取-高效液相色谱联用分析环境水样中的氨基甲酸酯农药

Determination of Carbamate Insecticides in Environmental Water by Solid-phase Microextraction Coupled with High-performance Liquid Chromatography

采用固相微萃取(SPME)-高效液相色谱(HPLC)联用技术分析了环境水中西维因、速灭威、呋喃丹3种氨基甲酸酯类农药。研究了SPME条件,如萃取时间、搅拌速度、解吸方式、解吸时间对3种氨基甲酸酯萃取量的影响,并用于农田灌溉水实际样品的测定。方法的检出限在0 12～1 7μg L之间,相对标准偏差在2 8%～6 1%之间,回收率在98 3%～102%之间,适合于环境水样中痕量氨基甲酸酯农药的分析。

A method was developed for the determination of sevin, metocarb and furadam in environmental water by solid_phase microextraction (SPME) coupled with high_performance liquid chromatography (HPLC). The experimental conditions for SPME, such as extraction time, stirring rate of sample solution, desorption mode and desorpiton time were optimized. The optimal conditions were 40 min of extraction time, 1 100 r/min of stirring rate, 2 min of desorption time and static desorption mode. The method was used for the determination of trace carbamates in field water. The limits of detection for sevin, metocarb and furadam were 0.12 μg/L, 1.7 μg/L and 0.45 μg/L,respectively,the relative standard deviations were 2.8%～6.1% and the recoveries were 98.3%～102%. The method is solvent_free, fast, convenient, sensitive, and suitable for the determination of trace carbamates in environmental water.