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Reference type: Journal
Authors: Yu JCC, Hrdina A, Mancini C, Lai EPC
Article Title: Molecularly imprinted polypyrrole encapsulated carbon nanotubes in stainless steel frit for micro solid phase extraction of estrogenic compounds.
Publication date: 2007
Journal: Journal of Nanoscience and Nanotechnology
Volume: 7
Issue: (9)
Page numbers: 3095-3103.
DOI: 10.1166/jnn.2007.666

Abstract: A novel micro-solid phase extraction (mu SPE) device was prepared by electrochemically adhering molecularly imprinted polypyrrole encapsulated carbon nanotubes (MIPPy/CNTs) onto a stainless steel frit. It was found that the use of CNTs increased the total binding capacity without compromising the porosity of the frit. Three templates, 17α-ethynyl estradiol (EE2), 17 β-estradiol (E2), and ochratoxin A (OTA) were imprinted individually to make their respective MIPPy/CNTs-modified frits. The binding properties of these mu SPE devices were characterized by high performance liquid chromatography (HPLC) with fluorescence detection (FLD). In comparison with non-imprinted polypyrrole encapsulated carbon nanotubes (PPy/CNTs), the molecular imprinting technique enhanced the selective binding towards the imprint molecules. MIPPy/CNTs-mu SPE-HPLC-FLD results demonstrated the selectivity of MIPPy had been tailored by imprinting with different templates. This is the first report on how versatile pyrrole can be as a functional monomer for the molecular imprinting of target compounds with a broad range of high to low pKa values
Template and target information: 17α-ethynyl estradiol, EE2, 17β-estradiol, E2, ochratoxin A, OTA


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