催化动力学光度法测定痕量亚硝酸根
Catalytic Kinetic Spectrophotometric Determination of Trace Nitrite
卫世乾 1何琴 2韩宇2
作者信息
- 1. 许昌学院 学报编辑部,河南 许昌 461000
- 2. 许昌学院 化工与材料学院,河南 许昌 461000
- 折叠
摘要
在冰乙酸介质中,利用亚硝酸根催化条件下,溴酸钾氧化茜素红的褪色反应,建立催化动力学光度法,对痕量NO2- 进行测定.通过单因素实验得到了各种成分的加入量、反应温度和反应时间等最佳条件.结果发现,在反应体系中,茜素红浓度与NO2- 含量之间线性关系良好,在0.02～0.14 μg/mL范围内,线性回归方程为ln(A0/A)= 1.43 cNO3-(μg/mL)+0.008 59,相关系数r2 为0.997 0,检出限为5.25×10-3 μg/mL.该方法操作简单、稳定性好.
Abstract
A catalytic kinetic spectrophotometric method was established for the determination of trace NO2- in glacial acetic acid medium by the oxidation of alizarin red by potassium bromate under the condition of nitrite catalysis.The optimum conditions such as the amount of each ingredient,reaction temperature and reaction time were obtained by single factor experiment.The results show that there is a good relationship between alizarin red concentration and NO2- content in the reaction system.In the range of 0.02～0.14 μg/mL,the linear regression equation is ln(A0/A)= 1.43c NO3-(μg/mL)+0.008 59,the correlation coefficient r2 is 0.997 0,and the detec-tion limit is 5.25×10-3 μg/mL.The method is simple to operate and the results are stable.
关键词
亚硝酸根/冰乙酸/溴酸钾/茜素红/催化动力学光度法Key words
nitrite/ice acetic acid/potassium bromate/alizarin red/catalytic kinetic photometry引用本文复制引用
基金项目
河南省科技攻关计划(232102231050)
出版年
2024
NETL
NSTL
万方数据