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An amperometric detection method has been developed and used for determination of polyols (erythritol,xylitol,sorbitol,arbaitol,adonitol,mannitol,galactitol) by capillary zone electrophoresis.Electrophoretic runs were performed in a 70 mmol L-1 Na2B4O7 running buffer (pH=9.3) in capillary and 70 mmol L-1 NaOH (pH=13) in detetion resevoir at a separation voltage of 17 kV.