醋中总酸检测方案(自动电位滴定)

智能文字提取功能测试中

醋的总酸测定 应用资料根据酸碱中和原理，用氢氧化钠标准滴定溶液滴定试液中的酸，中和试样溶液至pH为8.2时，确定为滴定终点。按碱液的消耗量计算食品中的总酸含量。TIF-98005enLK-MKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoAcidity of Vinegar Industry Food & beverage Instrument Automatic potentiometric titrator Measurement method Acid-base titration Standards GB 12456 1.Overview Potentiometrically titrate a vinegar sample with 0.1mol/L sodium hydroxide up to pH8.2 andconvert the titration volume to acetic acid. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) pH glass electrode Electrode Ceramic reference electrode Temperature compensation electrode 3. Reagents Titrant 0.1mol/L NaOH Solvent Pure water 4. Example —Measurement results一 Sample Titer Conc. (mL) (mL) (%) 1 4.2845 2.571 2 5.0 4.2647 2.559 3 4.2698 2.562 Average 2.564 SD 0.006 RSD(%) 0.2 —Titration curve一 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