Abstract: Chemiluminesence Reaction of PotassiumPermanganate-I - Foumaldehyde Systemwas studied as a new methodfor determinationofmicroam ounts iodineinfood.Theeffectfactors as consistencyofvarious reacti on’ s matter,acidity interfering ions ,etc.were obtained as the analytical results.Under optimal condition,the linear range for the determination of I - was 1.0×10 -6 ～4.0×10 -5 g /ml the detection limit was 2.4×10 -8 g /ml,and the relative stan-dard deviationfor the determinatio n of1.0×10 -5 g /ml I - (n =11)was 2.8%.The results were satisfactory.

Key words: Chemiluminescence analysis , Formaldehyde , Trace iodine , Potassiumperma nganate , Foods