Preparation of molecularly imprinted polymers for the solid phase extraction of pyridoxal 5'-phosphate prior to HPLC determination için kapak resmi
Preparation of molecularly imprinted polymers for the solid phase extraction of pyridoxal 5'-phosphate prior to HPLC determination
Başlık:
Preparation of molecularly imprinted polymers for the solid phase extraction of pyridoxal 5'-phosphate prior to HPLC determination
Yazar:
Özyurt, Ömer, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
xiii, 64 leaves: charts;+ 1 computer laser optical disc.
Özet:
Three different sorbent materials were prepared for solid phase extraction of pyridoxal phosphate (PLP), namely, carbon sphere based molecularly imprinted chitosan polymer (MICP), magnetite based molecularly imprinted chitosan polymer (MMICP) and silica (sol-gel) based molecularly imprinted polymer (IMIP). The sorbents were characterized by FT-IR, SEM, EDX, XRD, and TGA. The characterization data have shown that, the sorbents were relatively homogeneous, had very fast sorption kinetics and quantitative sorption over a wide range of analyte concentrations (1.0-100.0 mg/L). All the sorbents were found to be selective to PLP in presence of similar compounds; namely, pyridoxamine, nicotinic acid (vitamin B3), pyridoxal and 4-pyridoxic acid. Sorption parameters for each sorbent were optimized. The optimum sorbent amount for 10.0 mL sample volume was found to be 5.0 mg for MICP and 10.0 mg for both MMICP and IMIP. A shaking duration of 30 min was employed in sorption experiments. Among the potential eluents, acetic acid solution (2%, v/v) has shown the best desorption performance for all three sorbents. Method validation was investigated via spike recovery tests on water (ultra-pure, bottled and tap) and artificial serum samples. The recoveries obtained with water samples were greater than 96%, 92%, and 91% for MICP, MMICP, and IMIP, respectively. These results show the potential application of the methodologies for samples with relatively simple matrix. High recoveries (greater than 80%) were also obtained with artificial serum samples, whereas the use of matrix-matched calibration or internal standardization is suggested together with protein precipitation for biological samples with high protein content.
Yazar Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)--İzmir Institute of Technology:Chemistry.

İzmir Institute of Technology: Chemistry --Thesis (Master).
Elektronik Erişim:
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