流动注射催化光度法测定环境水样中的痕量亚硝酸根  

Determination of Trace Nitrite in Environmental Water by Flow-injection Catalytic Spectrophotometry

作　　者：袁东[1] 张新申[1] 张丽萍[2] 涂杰[1] 谢永红[1] 李翔[1] 

机构地区：[1]四川大学轻纺与食品学院,四川成都610065 [2]四川理工学院材料与化学工程系,四川自贡643000

出　　处：《化工环保》2006年第6期522-524,共3页Environmental Protection of Chemical Industry

基　　金：国家高技术研究发展计划(863)项目(2002AA639290)。

摘　　要：基于在pH为2.7的一氯乙酸缓冲溶液中亚硝酸根对溴酸钾氧化亮绿具有催化作用,建立了测定环境水样中痕量亚硝酸根的流动注射催化光度法。在室温下,当溴酸钾浓度为0.15mol/L、亮绿溶液浓度为1.12×10-3mol/L时,该方法的线性范围为0.04～0.36mg/L,检出限为7.44×10-4mg/L,测定频率为60次/h,相对标准偏差为1.1%(n=11)。Based on the catalysis of nitrite on oxidation of brilliant green by potassium bromate in a buffer solution of chloroacetic acid with pH 2.7, a new flow-injection catalytic spectrophotometric method was founded for the determination of trace nitrite in environmental water sample. The experimental results show that when the determination is carried out at room temperature and the concentration of KBrO3 and brilliant green is 0. 15 mol/L and 1. 12 × 10^-3 mol/L respectively, the linear range for the method is 0.04-0.36 mg/L, and the detection limit is 7.44 × 10^-4 mg/L. The sampling frequency is about 60 time/h, and the relative standard deviation is 1.1% （ n = 11 ）.

关 键 词：流动注射催化光度法 亚硝酸根 溴酸钾 亮绿 环境监测 

分 类 号：X832[环境科学与工程—环境工程]