Amperometric responses of some biosensor-related analytes at electrodes coated with semipermeable polymer layers: a comparative study

作者：Kozlovskaja Svetlana; Garjonyte Rasa; Malinauskas Albertas^*

来源：Chemija, 2012, 23(1): 7-11.

• amperometric analysis
• hydrogen peroxide
• ascorbate
• nafion
• polypyrrole
• poly(o-phenylenediamine)

Amperometric responses of hydrogen peroxide, ascorbate and paracetamol have been studied at platinum electrodes coated with Nafion or electropolymerized polypyrrole and poly(o-phenylenediamine) layers. Among the three layers studied, the Nafion layer shows superior properties. It possesses high permeability to hydrogen peroxide (95% as compared to naked platinum) and drastically diminishes responses from common interferences like ascorbate (up to 1-4%) and paracetamol (up to 46%). The electropolymerized poly(o-phenylenediamine) layer also shows good permeability to peroxide (90%), whereas its ability to repel ascorbate (up to 11-46%) does not appear to be as efficient as that of Nafion. The electropolymerized polypyrrole layer retards the permeability of peroxide and paracetamol up to 60% and increases the response to ascorbate by the factor of 1.9-2.6, probably due to its electrocatalytic action.

• 出版日期2012