改性固相微萃取吸附柱用于分离痕量有机单体的研究

ake some organic monomer (OM) as template, using UV polymerization of molecular imprinted polymers (OM-MIPs). Monomers are methyl methacrylates (MAA), cross linker is ethylene glycol dimethacrylate (EDMA), initiator is azobisisobutyronitrile (AIBN). Using OM-MIPs as the stationary phase prepared by OM-MIPs-SPME adsorption column, separation of the samples extracted using EIMS of the eluate were detected in the organic monomer, respectively, with conventional Cl8 and non-imprinted polymer (NIP) solid phase extraction methods were compared. The results show that the OM-MIPs-SPME method is specific for recognition of organic monomers. The best extraction conditions were: water phase on the sample, with 50% (v / v) methanol / aqueous leaching to remove non-specific binding disruptors, l% (v / v) acetic acid in methanol elution specific binding of the real samples of organic monomer. Sample test showed that: after OM-MIPs-SPME pre-concentration method can effectively eliminate 94.2% of the impurity with the system can be used for sample isolation and identification of trace organic monomers.