期刊
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
卷 12, 期 -, 页码 -出版社
BIOMED CENTRAL LTD
DOI: 10.1186/s40201-014-0137-z
关键词
Molecular imprinted polymer nanoparticles; 2,4-dichlorophenoxyacetic acid; Selective preconcentration; Urine and water samples
资金
- Tehran University of Medical Sciences
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 mu g L-1, and these data for urine samples were 4.7% and 1.80 mu g L-1, respectively. The method was applied to the determination of 2,4-D in the urine and different water samples.
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