化学发光法直接测定水中1,3-二氯-5,5-二甲基海因的研究

Study on the Chemiluminescence Method for Directly Determination of 1,3-Dichloro(Dibromo)-5,5-Dimethyl-Hydantoin in Water

研究了在碱性条件下 ( p H:12 .0— 12 .5) 1,3-二氯 - 5,5-二甲基海因与鲁米诺 -过氧化氢体系产生的化学发光性质 ,首次建立了一种测定其含量的新方法 ,并应用于游泳池水中 1,3-二氯 - 5,5-二甲基海因的测定 ,结果满意。 1,3-二氯 - 5,5-二甲基海因的浓度在 8.0× 10 -8— 5.0× 10 -6mol/ L范围内 ,与化学发光强度呈良好的线性关系。方法的线性范围宽 ,测定 5.0× 10 -7mol/ L的 1,3-二氯 - 5,5-二甲基海因 11次 ,求得相对标准偏差为 4 .7% ,回收率为 83%— 90 % ,方法的检出限为 5.0× 10 -8mol/ L。

The chemiluminescence properties of 1,3\|dichloro\|5,5\|dimethyl\|hydantoin have been studied and a new method for determination of it has been developed from its reaction with luminol\|H 2O 2 in the alkaline medium (pH:12.0—12.5).The linear range of the determination is 8.0×10 -8 —5.0×10 -6 mol/L.Relative standard deviation is 4.7% for 5.0×10 -7 mol/L 1,3\|dichloro\|5,5\|dimethyl\|hydantoin and the recovery is in the range of 83%—90%.The detection limit is 5.0×10 -8 mol/L.This method has been applied to the determination of 1,3\|dichloro\|5,5\|dimethyl\|hydantoin in swimming pools with satisfactory results.