A chemically modified carbon-paste electrode has been described for the sensitive and selective determination of amantadine. Beta-cyclodextrin was used as modifier. The electrode shows a sub-Nernstian response of 51.0 +/- 1.0 mV decade(-1) for amantadine in the concentration range of 6.3 x 10(-10)-7.1 x 10(-7) M at 25 degrees C. The optimum pH value was maintained at 4.5 using a 0.02 M acetate ...