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  • 标题:Application of molecular imprinted polymer nanoparticles as a selective solid phase extraction for preconcentration and trace determination of 2,4-dichlorophenoxyacetic acid in the human urine and different water samples
  • 本地全文:下载
  • 作者:Fariborz Omidi ; Mohammad Behbahani ; Hamid Sadeghi Abandansari
  • 期刊名称:Journal of Environmental Health Science and Engineering
  • 印刷版ISSN:2052-336X
  • 出版年度:2014
  • 卷号:12
  • 期号:1
  • 页码:137
  • DOI:10.1186/s40201-014-0137-z
  • 语种:English
  • 出版社:BioMed Central
  • 摘要:

    A molecular-imprinted polymer nanoparticles (MIP-NP) for the selective preconcentration of 2,4-dichlorophenoxyacetic acid (2,4-D) is described. It was obtained by precipitation polymerization from methacrylic acid (the functional monomer), ethylene glycol dimethacrylate (the cross-linker), 2,2′-azobisisobutyronitrile (the initiator) and 2,4-D (the template molecule) in acetonitrile solution. The MIP-NPs were characterized by thermogravimetric analysis, and by scanning electron microscopy. Imprinted 2,4-D molecules were removed from the polymeric structure using acetic acid in methanol (15:85 v/v %) as the eluting solvent. The sorption and desorption process occur within 10 min and 15 min, respectively. The maximum sorbent capacity of the molecular imprinted polymer is 89.2 mg g−1. The relative standard deviation and limit of detection for water samples by introduced selective solid phase extraction were 4.2% and 1.25 μg L−1, and these data for urine samples were 4.7% and 1.80 μg L−1, respectively. The method was applied to the determination of 2,4-D in the urine and different water samples.

  • 关键词:Molecular imprinted polymer nanoparticles; 2,4-dichlorophenoxyacetic acid; Selective preconcentration; Urine and water samples
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