Abstract: The graphite-AS(acrylonitrile-styrene copolymer) composite electrodes were prepared and characterized by IR and cyclic voltammetry. The electrodes were applied in determination of trace amount of Ag⁺ in waste water and showed a higher stability, reproductivity and selectivity. Owing to the presence of the abundant polar groups from AS, the electrodes showed an advantages of being further modification with NH₂OH·HCl, giving an additional property.

Key words: polymer/graphite electrode, acrylonitrile-styrene copolymer, trace silver determination, modified electrode, electrochemical property