邻二氮菲活化氯离子催化溴酸钾氧化核固红褪色光度法测定痕量氯  

Catalytic Spectrophotometry for the Determination of Trace Chlorine Based on Oxidizing Discoloration Reaction Between Nuclear Fast red and Potassium Bromate with 1,10-Phenanthroline as Activating Agent

作　　者：吴如虎 吴若红[2] 

机构地区：[1]泉州市环境监测站,福建泉州362000 [2]福建教育学院生化系,福建福州350001

出　　处：《福建教育学院学报》2003年第10期100-101,共2页Journal of Fujian Institute of Education

摘　　要：基于H2SO4 介质和邻二氮菲存在下 ,Cl-能显著地催化KBrO3 氧化核固红的褪色反应 ,因而提出了一种高灵敏邻二氮菲活化氯离子催化溴酸钾氧化核固红褪色光度法测定痕量氯的新方法。氯含量在0.40～3.2μg/L范围内与△A值符合比尔定律 ,工作曲线的回归方程为ΔA=0.09492 +0.1053CCl (μg/L) ,相关系数为r=0.9996,检出限为0.11ug/L。该方法准确、灵敏、操作简便 ,选择性好 ,成功用于水样中的氯含量的测定。A new sensitive catalytic spectrophotometry method for the determination of trace chlorine was established. It is based on chlorine ion catalyzed oxidizing coloration reaction of nuclear fast red, by potassium bromate in the media of sulfuric acid solution and 1,10-Phenanthroline. The linear regression aquation isΔA = 0.09492 + 0.1053 CCl (μg/L),r=0.9995. The Beer's law is obeyed in the range of 0.40 ～ 3.2μg /L with detection limit of 1.1×10-10g/mL .The method is exact,sensitive, convenient, variable,and applied to determine the content of Cl- in water with satisfactory results.

关 键 词：氯 催化褪色光度法 核固红 

分 类 号：TQ016[化学工程]