Preparation of a bifunctional pyrazosulfuron-ethyl imprinted polymer with hydrophilic external layers by reversible addition-fragmentation chain transfer polymerization and its application in the sulfonylurea residue analysis
writer：Meixian Yang, Yingying Zhang, Shen Lin, Xinlin Yang, Zhijin Fan*, Lixia Yang, and Xiangchao Dong*
keywords：Poly(glycerylmonomethacrylate), Sulfonylurearesidueanalysis
source：期刊
specific source：Talanta, 114 (1), 143-151 (2013). DOI: http://dx.doi.org/10.1016/j.talanta.2013.03.078
Issue time：2013年
A newbifunctionalpyrazosulfuron-thylimprintedpolymerwassynthesizedbythecombinationof
molecular imprinting technology and livingradicalpolymerization. In thesy nthesis, the pyrazosulfuron-ethyl imprinted polymer was obtained by the reversible addition–fragmentation chaintransfer(RAFT) precipitation polymerization followed by grafting poly(glycerylmonomethacrylate)(pGMMA) by the post-RAFT polymerization. In this research, we used polyethyleneglycol (PEG) as the polymeric porogen in order to increase the porosity of the material which is a new porogen application in the precipitation
polymerization. The imprinted polymer has selectivity for the template and ability of humic acids exclusion which has shown the meritsof molecularly imprinted polymers and restricted access materials. Anonlinesolid-phaseextraction/HPLC method for the analysis of three sulfonylurea residues in soil samples has been developed and validated. There covery of 81–99% in the spiked levels of 40–200 μg kg?1 was obtained and the limit of detection (LOD) and limit of quantification (LOQ) were less than 4.8 and 15.9 μg kg?1 respectively.The results demonstrated that this bifunctional material can be used for the efficient pyrazosulfuron-ethyl extraction in the sulfonylurea residue analysis from environmental samples.