磷酸二氢钾含量的测定 应用资料

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磷酸二氢钾含量的测定 应用资料磷酸二氢钠加入水中，用1mol/L氢氧化钠滴定溶液测定磷酸二氢钾。滴定值上升到滴定曲线上的最大拐点。根据氢氧化钠的滴定体积计算磷酸二氢钾的浓度。KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.TIQ-99173enL Application Memo Determination oh Potassium Dihydrogen Phosphate 1.Overview Potassium dihydrogen phosphate is determined by titration with 1mol/L sodium hydroxide after the sample is added with sodium chloride and dissolved in water.Titration goes up to the endpoint which is the maximum inflexion on the t itration curve.The concentration of potassium dihydrogen phosphate is calculated from the titration volume of sodium hydroxide. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier： STD) Electrode pH glass electrode Ceramic reference electrode Temperature compensation electrode 3. Reagents Titrant 1mo1/L sodium hydroxide (f =1.003)Solvent Pure water， Sodium chloride 4. Example -Measurement results— Sample Titer Concentration (g) (mL) (%) 1 2.0163 14.7831 100.077 2 2.0043 14.6382 99.690 3 2.0048 14.6760 99.923 Average 99.897 SD 0.195 RSD(%) 0.195 —Titration curve一 Please feel free to contact us for any further i nformation. Kyoto Electronics Manufacturing Co.， Ltd. Overseas Sales & Market i ng 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