Abstract
Two different glucose biosensors for the amperometric determination of glucose, based on poly( p-chlorophenylamide) (PCPA) and bilayer film of PCPA and Nafion (PCPA/Nafion), are successfully developed. These two biosensors show linear amperometric responses to glucose ranging from 2.0×10 −4 to 3.5×10 −2 mol l −1 and 5.0×10 −4 to 7.5×10 −2 mol l −1, respectively, with the same correlation coefficient of 0.9988. Effects of polymerization potential and polymerization time on the performance of enzyme sensors are studied. It is found that PCPA, as a non-conducting polymer, can largely reduce the influence of electroactive interferents. Introduction of inner Nafion membrane not only further eliminates the influence of ascorbic acid on the sensor response but also increases electrode stability.
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