title: A newly developed molecularly imprinted polymer on the surface of TiO2 for selective extraction of triazine herbicides residues in maize, water, and soil.
abstract: A new surface molecularly imprinted polymer (MIP) based on nano-TiO2 was developed using propazine (Pro) as a template molecule, ethyleneglycol dimethacrylate (EGDMA) as a crosslinker, methacrylic acid (MAA) as a functional monomer, and 2,2'-azobis (isobutyronitrile) (AIBN) as an initiator. Structures of the newly synthesized surface MIPs were characterized by Fourier transmission infrared spectrometry (FT-IR), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD). The MIP had a good adsorption capacity and high recognition selectivity to propazine. Meanwhile, it exhibited a cross-selectivity for simazine (Sim) and atrazine (Atr). The MIPs were used as a solid phase extraction (SPE) material. Concomitant extraction, purification, and determination of three pesticides (Pro, Sim, and Atr) residues in water, soil, and maize plant and grain samples were performed by MIP-SPE coupled with high performance liquid chromatography (HPLC). The highly selective separation and enrichment of Pro, Atr, and Sim from the complex environmental media can be achieved. Thus, the newly developed technique provides an analytical platform to quantify the trace amount of Pro, Sim, and Atr residues in multi environmental media and food source.
authors.affiliation: Jiangsu Key Laboratory of Pesticide Science, College of Science, Nanjing Agricultural University, Nanjing, 210095, China.
authors.forename: Hao Ran
authors.initials: HR
authors.lastname: Geng
authors.affiliation: Jiangsu Key Laboratory of Pesticide Science, College of Science, Nanjing Agricultural University, Nanjing, 210095, China.|Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, 210095, China.
authors.forename: Shan Shan
authors.initials: SS
authors.lastname: Miao
authors.affiliation: Jiangsu Key Laboratory of Pesticide Science, College of Science, Nanjing Agricultural University, Nanjing, 210095, China.
authors.forename: She Feng
authors.initials: SF
authors.lastname: Jin
authors.affiliation: Jiangsu Key Laboratory of Pesticide Science, College of Science, Nanjing Agricultural University, Nanjing, 210095, China. hongyang@njau.edu.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Yang
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis / Q000302:isolation & purification*; D005504:Food Analysis / Q000379:methods; D006540:Herbicides / Q000032:analysis / Q000302:isolation & purification*; D057230:Limit of Detection; D008958:Models, Molecular; D054802:Molecular Imprinting / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D014025:Titanium / Q000737:chemistry; D014227:Triazines / Q000032:analysis / Q000302:isolation & purification; D014867:Water / Q000032:analysis*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D006540:Herbicides; D011108:Polymers; D012987:Soil; D014227:Triazines; D014867:Water; C009495:titanium dioxide; D014025:Titanium
keywords: Environmental monitoring; Herbicide; Molecularly imprinted polymer; Nano-TiO2; Propazine; SPE