1,2-萘醌-4-磺酸钠体系分光光度法测定对苯二酚  

Spectrophotometric Determination of Hydroquinone with Sodium 1,2-Nnaphthoquinone-4-sulfonate as Chromogenic Reagent

作　　者：吴伶俐[1,2] 张欢欢[1] 李全民[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南省环境污染控制重点实验室,新乡453007 [2]河南广播电视大学农医学院,郑州

出　　处：《应用化学》2009年第4期462-466,共5页Chinese Journal of Applied Chemistry

基　　金：河南省教育厅自然科学基金资助项目(2008B150011)

摘　　要：建立了用1,2-萘醌-4-磺酸钠分光光度法测定对苯二酚的新方法。研究表明,在pH=13.00的KCl-NaOH缓冲溶液中,对苯二酚能够催化溶液中的OH^-离子与1,2-萘醌-4-磺酸钠反应形成橙红色的2-羟基-1,4-萘醌,其最大吸收波长为454 nm。对苯二酚质量浓度在1.3×10^-7～1.32×10^-5g/mL范围内与吸光度呈现良好的线性关系。线性回归方程为A=0.025 61＋0.073 28c（1×10^5mol/L）,线性相关系数r=0.995 5,检测限为9×10^-8g/mL。方法能直接用于水样中对苯二酚含量的测定,回收率在96.5%～103%。A novel and simple spectrophotometric method for determination of hydroquinone with 1,2-naphthoquinone-4-sulfonate reagent was developed.The method was based on 2-hydroxy-1,4-naphthoquinone（lawsone） formed from hydroxyl ion and NQS in a buffer solution of pH=13.00 with hydroquinone as a catalyst.Absorbency was linearly proportional to the concentration of hydroquinone in a range of 1.3×10^-7~1.32×10^-5 g/mL at the maximal absorption wavelength of 454 nm.The equation of linear regression was A=0.025 61＋0.073 28c（1×10^5 mol/L）,with a correlation coefficient of 0.995 5.The detection limit was 9×10^-8 g/mL（3σ/k）,and the recovery was in a range of 96.5%~103%.The method has been successfully applied to the determination of hydroquinone in water.

关 键 词：对苯二酚 萘醌-磺酸钠 分光光度法 

分 类 号：O652.6[理学—分析化学]