苯甲酸中纯度检测方案(自动电位滴定)

TIQ-99333enL-K-M KYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoPurity of Benzoic Acid 1.Overview Purity of benzoic acid is measured according to JIS K 8073-2017 Benzoic acid. Titrate with0.1mol/L sodium hydroxide after adding ethanol and pure water. Titration goes up to theendpoint， which is the maximum inflexion on the titration curve. Purity of benzoic acid can becalculated from the titration volume of sodium hydroxide. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) Electrode Combined glass electrode for micro titration Temperature compensation electrode 3. Reagents Titrant 0.1mol/L sodium hydroxide Solvent Pure water Additive Ethanol 4. Example Sample Titer Benzoic acid (g) (mL) (%) 1 0.4955 40.6698 99.20 2 0.4907 40.3759 99.45 3 0.5000 41.0843 99.31 Average 99.32 SD 0.12 Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd. Overseas Sales & Marketing Sect. 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市徐汇区宜山路333号1201室电话：021-54488867 电邮： kemu-kem@163.com 网址： http：//www.kem-china.com 苯甲酸纯度的测定 应用资料(英文版)苯甲酸纯度按照HG/T 3458化学试剂 苯甲酸测定。加入乙醇和纯水后用0.1mol/L氢氧化钠滴定。终点是滴定曲线上的最大拐点。苯甲酸的纯度可以通过氢氧化钠的滴定体积来计算。