Molecularly Imprinted Polymer Applied to the Solid Phase Extraction for Trace Analysis of Tribenuron-Methyl in Water and Soil Samples

A molecularly imprinted polymer (MIP) was synthesized by bulk polymerization method using tribenuron-methyl (TBM) as the template molecule, methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EDMA) as the cross-linker and 2,2'-azobisisobutyronitrile (AIBN) as the initiator. After the polymerization, the template molecule was removed from the polymer by an accelerated solvent extractor (ASE). The resulted MIP was evaluated by static absorption, kinetic absorption and selective experiments with high performance liquid chromatography (HPLC). The polymer was further used as the solid phase extraction (SPE) material to determine trace TBM coupled with HPLC, as a result, the recoveries of the method were from 90.18 to 92.69% and the RSD% were less than 2.52 in the water and soil samples. Low detection limit was also obtained in the method evaluation study.