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Preparation and evaluation of molecularly imprinted polymers based on 9‐ethyladenine for the recognition of nucleotide bases in capillary electrochromatography
Author(s) -
Huang YiChen,
Lin ChunChi,
Liu ChuenYing
Publication year - 2004
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200305735
Subject(s) - capillary electrochromatography , molecularly imprinted polymer , ethylene glycol dimethacrylate , chemistry , methacrylic acid , polymerization , electrochromatography , chromatography , polymer , acetonitrile , analyte , thymine , methacrylate , capillary action , ethylene glycol , capillary electrophoresis , materials science , selectivity , organic chemistry , catalysis , dna , biochemistry , composite material
A molecularly imprinted polymer (MIP) comprising 9‐ethyladenine was polymerized in situ inside the capillary for the electrochromatographic separation of nucleotide bases. The capillary wall was first functionalized with 3‐trimethoxysilylpropyl methacrylate (10% v/v) and 1,1‐diphenyl‐2‐picrylhydrazyl (0.01% w/v) in toluene. Following this treatment, the capillary was filled with acetonitrile containing 9‐ethyladenine, methacrylic acid, ethylene glycol dimethacrylate, and initiator. After polymerization, the MIP was shrunk into a film against the inner wall of the capillary with the syringe pump. The template was then removed with methanol under nitrogen flow. For evaluation the feasibility of the MIP column for the separation of nucleotide bases, some parameters including the pH, concentration of the background electrolyte, the applied voltage as well as the effect of organic modifier were studied. The migration behavior of nucleotide bases on the MIP column was also compared with that on the bare fused‐silica column. The results indicated that the MIP columns demonstrated better recognition properties at a pH range of 6–8. The efficiency (plates/m) at pH 8 for the nonimprinted analyte was 75 300 for cytosine, 50 200 for thymine, and 14 800 for guanine. However, the efficiency for the imprinted analyte, adenine, was quite low. This was evidenced by the broad peak, yielding only 2600 plates/m.