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چکیده
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A new molecularly imprinted polymer coated on carbon nanotubes ( MIPs/MWNTs) was synthesized The L- Cys –MIP are prepa red by dissolving s amounts of L-Cys in 35 acetonitrile as a porogen solvent in the presence of ethylene glycol – dimethacrylat e (EGDMA) as cross -linking, acrylic acid (AA) as functional monomer, and 2,2-azobisisobutyronitrile (AIBN) as initiator The synthesized M IPs were characterized by scanning electron microscopy, Xray diffraction, Fourier transform infrar ed spectroscopy, spectrophotometry and thermal analysis techniques .The application of this sorbent was investigated in preconcentration and determination with a simple and selective spectrophotometric method with charge transfer of DD Q and low concentrations of L Cys . Furthermore, For achieving optimal preconcentration and reducting non specific interactions, various parameters affecting the extraction efficiency were evaluated. Under the optimized conditions, An excellent linearity was found wi thin the wide range of 3 .0 –200 ng ml 1 with coefficient of determination (r 2 ) > 0.993 and the limit of detection was found to be 1.5 ng mL – 1 . Validation of the presented method was performed by analysing several standard reference materials with certified L Cys concentrations and apple
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