A modified method for dispersing platinum particles on a glassy carbon (GC) electrode was investigated. The ultramicro Pt particle-modified electrode obtained exhibited high catalytic stability and activity towards the oxidation of some halide ions (Br - , I - ) and inorganic sulfur species (S 2 O 2 - 3 , and SO 2 - 3 and SCN - ). These anions were separated and detected by using ion chromatography and electrochemical detection via this novel dispersed Pt particles-GC working electrode. The detection limits were 20 ng/ml for Br - , 1.0 ng/ml for I - , 10 ng/ml for SO 2 - 3 and 4.0 ng/ml for SCN - . This method was employed for the analysis of industrial and environmental waste waters.