饮用水中苯基脲除草剂的分子印迹固相萃取方法研究

摘要

以N-(4-异丙基苯基)-N'-亚丁基脲分子印迹聚合物为吸附剂,建立了饮用水中苯基脲除草剂的分子印迹固相萃取方法.上样后固相萃取柱依次用2.5 mL 0.1 mol/L盐酸和2.5 mL去离子水淋洗,然后氮气吹干,再用1 mL含8％乙腈的甲苯溶液淋洗,最后用2 mL甲醇洗脱.将建立的方法用于自来水中异丙隆、非草隆、甲氧隆、绿麦隆、枯莠隆、灭草隆、伏草隆、草不隆等8种苯脲类除草剂的测定,除伏草隆和草不隆的回收率较低外,其余6种除草剂的回收率均＞60％.%Molecular imprinting solid-phase extraction ( MISPE) was developed for phenylurea herbicides in drinking water by using N-(4-isopropylphenyl) -N-butyleneurea molecularly imprinted polymer as sorbent.Loaded the tap water,the MISPE cartridge was orderly washed by 2.5 mL 0.1 mol/L HC1 and 2.5 mL deionized water.The MISPE cartridge was dried by nitrogen,and then washed by 1 mL 8% acetonitrile in toluene,and finally eluted by 2 mL methanol.The method was used to determinate isoproturon,fenuron,metoxuron,chlortoluron,difenoxuron,monuron,fluometuron and neburon in tap water.Test results of recoveries for those herbicides were more than 60% except for the fluometuron and neburon.