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：姜玉颖[1] 陈燕芳[1] 施小英[1] 

机构地区：[1]漳州师范学院化学系,福建漳州363000

出　　处：《漳州师范学院学报（自然科学版）》2004年第3期58-60,共3页Journal of ZhangZhou Teachers College（Natural Science)

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0．40-3．21g／L范围内与△A值符合比尔定律，工作曲线的回归方程为△A=0．09492+0．1053 C Cl-(1g／L)，相关系数为r=0．9996，检出限为1．1×10^-10g/mL.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 discoloration 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 C Cl-(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：邻二氮菲 褪色光度法 溴酸钾 催化 痕量 氧化 褪色反应 KB 灵敏 活化 

分 类 号：O657[理学—分析化学] R339.1[理学—化学]