糖浆中钙含量检测方案(自动电位滴定)

糖浆中钙含量的测定 应用资料钙与氨羧络合剂能定量地形成金属络合物，其稳定性较钙与指示剂所形成的络合物为强。在适当的pH值范围内，以氨羧络合剂EDTA滴定，在达到当量点时，EDTA就自指示剂络合物中夺取钙离子，使溶液呈现游离指示剂的颜色(终点)。根据EDTA络合剂用量，可计算钙的含量。KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.TIF-99181enL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.comK-MKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application Memo Quantitative Determination of Calcium in Syrup 1.Overview After adding 10% sodium sulfide， ammoniac buffer solution (Ammonium chloride +Ammoniawater) and BT indicator to the diluted sample， calcium oxide concentration in the sample ismeasured by titration with the EDTA. The endpoint is the maximum inflexion on the titrationcurve. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier PTA) Electrode Photometric sensor Interference filter (530nm) 3. Reagents 4. Example 25.0 45.3 Q CXT3 一 一 吕1 Sample size(g) Titer(mL) Concentration (mg/100g) 1 23 1.04721.0652 1.0192 0.23530.2435 0.2303 22.469 22.860 22.596 AverageSD RSD(%) 22.642 0.199 0.881 -Titration curve一 Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd. Overseas Sales & Marketing Sect.