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NO_(2)^(-)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NO_(2)^(-)含量之间线性关系良好,在0.02~0.14μg/mL范围内,线性回归方程为ln(A_(0)/A)=1.43 c NO_(3)^(-)(μg/mL)+0.00859,相关系数r^(2)为0.9970,检出限为5.25×10^(-3)μg/mL.该方法操作简单、稳定性好.
A catalytic kinetic spectrophotometric method was established for the determination of trace NO_(2)^(-)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 NO_(2)^(-)content in the reaction system.In the range of 0.02~0.14μg/mL,the linear regression equation is ln(A_(0)/A)=1.43 c NO_(3)^(-)(μg/mL)+0.00859,the correlation coefficient r^(2)is 0.9970,and the detection limit is 5.25×10^(-3)μg/mL.The method is simple to operate and the results are stable.
作者
卫世乾
何琴
韩宇
WEI Shiqian;HE Qin;HAN Yu(Department of Journal of Xuchang University,Xuchang University,Xuchang 461000,China;College of Chemical Engineering and Materials,Xuchang University,Xuchang 461000,China)
出处
《许昌学院学报》
CAS
2024年第2期66-69,共4页
Journal of Xuchang University
基金
河南省科技攻关项目(232102231050)。
关键词
亚硝酸根
冰乙酸
溴酸钾
茜素红
催化动力学光度法
nitrite
ice acetic acid
potassium bromate
alizarin red
catalytic kinetic photometry
