TRACK MEMBRANES AS SELECTIVE ELEMENTS FOR ELECTROCHEMICAL BIOSENSORS

The permeability of standard and modified polyethylene terephthalate t rack membranes with respect to molecules of glucose and ascorbic acid was investigated. It was shown that the permeability of the membranes can be correlated with the pore surface charge. A method was found for modifying track membranes with an initial pore diameter of approximat ely 50 nm in which the membrane totally retains molecules of ascorbic acid, and the effective diffusion coefficient of molecules of glucose in the pores is close to the volumetric diffusion coefficient.