title: Uniform-sized molecularly imprinted polymer for metsulfuron-methyl by one-step swelling and polymerization method.
abstract: Uniform-sized molecularly imprinted polymer (MIP) beads for metsulfuron-methyl (MSM) were firstly prepared by one-step swelling and polymerization method using 4-vinylpyridine (4-VPY) and ethylene glycol dimethacrylate (EDMA) as functional monomer and cross-linker, respectively. The preparation was optimized by varying the ratio of MSM to 4-VPY. The chromatographic behaviors of MSM and other structurally related sulfonylureas (SUs) on the resultant MIP column were evaluated. The imprinted polymer revealed specific affinity to the template and the fair resolution of SUs was also obtained. Furthermore, the uniform-sized MSM-MIP was used as the solid phase extraction (SPE) material to enrich MSM in real water samples before reversed-phase HPLC (RP-HPLC) analysis. The recovery of MSM from 100mL of drinking water at a 50ng/L spike level was 99.59% with R.S.D. of 1.13%. The detection limit was about 6.0ng/L of MSM when enriching a 100mL water sample.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Laboratory of Analytical Chemistry for Life Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
authors.forename: Xiangjun
authors.initials: X
authors.lastname: Liu
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Chen
authors.forename: Rui
authors.initials: R
authors.lastname: Zhao
authors.forename: Dihua
authors.initials: D
authors.lastname: Shangguan
authors.forename: Guoquan
authors.initials: G
authors.lastname: Liu
authors.forename: Yi
authors.initials: Y
authors.lastname: Chen