蚀刻剂中氯化亚铁含量的测定 应用资料

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蚀刻剂中氯化亚铁含量的测定 应用资料(英文版)当蚀刻剂样品不含氯离子时，向样品中加入硫酸后，通过用0.01mol/L高锰酸钾溶液滴定来测量氯化亚铁浓度。在本应用中，由于样品含有氯离子，在滴定前加入硫酸锰以避免干扰反应。如果样品含有过多的氯离子，通过真空蒸发浓缩除去大部分氯化氢。KGMKYOTO ELECTRONICS MANUFACTURING CO.,LTD.TIN-01050enL Application Memo Ferrous Salt in Etchant Industry Iron and steel Instrument Automatic potentiometric titrator Measurement method Redox titration Standards 1. Overview When an etchant sample does not contain chloride ion, after adding sulfuric acid to a sample, the ferrous salt concentration is measured by titration with 0.01mol/L potassium permanganate solution. 10FeSO4 + 2KMnO4 + 8H2SO4 → K2SO4 + 2MnSO4 + 5Fe2(SO4)3 + 8H2O In this application memo, as the sample contains chloride ion, add manganese sulfate to avoid an interference reaction before titration. If a sample contains too much chloride ion, remove most hydrogen chloride by concentrating by vacuum evaporation. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) Electrode Combined platinum electrode 3. Reagents Titrant 0.01mol/L (0.05N) potassium permanganate solution Solvent Manganese sulfate (Crystalline manganese sulfate, Phosphoric acid, Sulfuric acid) 4. Example ―Measurement results― Sample Titer FeCl2 (g) (mL) (%) 1 0.5163 10.6041 13.11 2 0.5199 10.4438 12.82 3 0.5096 10.5516 13.21 Average 13.05 SD 0.20 RSD(%) 1.6 ―Titration curve― Please feel free to contact us for any further information. ＜Contact ＞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 电邮: kemu-kem@163.com