通过大量的试验确定了碘量法连续测定水中ＣｌＯ２、Ｃｌ２、ＣｌＯ－２和ＣｌＯ３－的适宜条件。该方法的准确度、精密度和灵敏度都较好。其方法的回收率：ＣｌＯ２为９６７８％；Ｃｌ２为９８１７％；ＣｌＯ－２为９７２８％；ＣｌＯ３－为１０３３１％。变异系数：ＣｌＯ２为１５２％；Ｃｌ２为２３７％；ＣｌＯ２－为２４３％；ＣｌＯ３－为３５６％。最低检出限：ＣｌＯ２为００５０ｍｇ／Ｌ；Ｃｌ２为００５０ｍｇ／Ｌ；ＣｌＯ２－为００５０ｍｇ／Ｌ；ＣｌＯ３－为０５００ｍｇ／Ｌ。 Through a large number of tests, the suitable conditions for the continuous determination of ClO2, Cl2, ClO-2 and ClO3 in water by the iodometric method were determined. The accuracy, precision and sensitivity of this method are all better. The recoveries of the method were: ClO2 96.78%; Cl2 98.7%; ClO-2 97.8% 28%; ClO3 103.31%. Coefficient of variation: ClO2 is 152%; Cl2 is 237%; ClO2 is 243%; ClO3 is 356%. The minimum detection limit: ClO2 is 0050 mg/L; Cl2 is 0050 mg/L; ClO2 is 0050 mg/L; ClO3 is 0500 mg/L.