本文已被:浏览 1052次 下载 681次
投稿时间:2021-02-08 修订日期:2021-02-18
投稿时间:2021-02-08 修订日期:2021-02-18
中文摘要: 利用自动电位滴定仪建立了一种测定对氨基苯酚(PAP)氨基值的方法,根据重氮化反应的原理,分别从反应温度、滴定方式以及无机酸的种类和浓度条件进行了优化,样品在氢溴酸/盐酸体系,35 ℃滴定温度自动滴定氨基值,结果表明,对氨基苯酚样品的氨基值与手动滴定法相差较小,回收率在98.8 % ~ 101.2 %之间,说明了该方法与《GB/T 21892-2015》方法对比,具有操作简便,自动化程度高,滴定终点判断敏锐,测定结果准确可靠的优点,可用于PAP的氨基值测定。
Abstract:An automatic potentiometric titration method for the determination of amino-value of p-aminophenol (PAP) was established. According to the principle of diazotization reaction, the reaction temperature, titration method and the type and concentration of inorganic acid were optimized. The amino-value of the sample was titrated automatically in 30 % hydrobromic acid/hydrochloric acid system at 35 ℃. The difference of automatic titration and manual titration is small, and the recovery rate is between 98.8 % and 101.2 %. Compared with GB/T 21892-2015, this method has the advantages of simple operation, high degree of automation, sharp judgment of titration point, accurate and reliable determination results, and can be used for determination of amino-value of PAP.
文章编号: 中图分类号: 文献标志码:
基金项目:
引用文本:
陶文波,张婷,王芳,李杰,赵洁,王根林,徐林.自动电位滴定法测定对氨基苯酚氨基值[J].中国无机分析化学,2021,11(4):80-84.
taowenbo,zhangting,wangfang,lijie,zhaojie,wanggenlin,xulin.Determination of Amino-value of p-Aminophenol by Automatic Potentiometric Titration[J].Chinese Journal of Inorganic Analytical Chemistry,2021,11(4):80-84.
陶文波,张婷,王芳,李杰,赵洁,王根林,徐林.自动电位滴定法测定对氨基苯酚氨基值[J].中国无机分析化学,2021,11(4):80-84.
taowenbo,zhangting,wangfang,lijie,zhaojie,wanggenlin,xulin.Determination of Amino-value of p-Aminophenol by Automatic Potentiometric Titration[J].Chinese Journal of Inorganic Analytical Chemistry,2021,11(4):80-84.