蚀刻剂中三氯化铁含量的测定 应用资料

蚀刻剂中三氯化铁含量的测定 应用资料测量蚀刻剂中三氯化铁浓度的方法如下所示。作为预处理，在锥形烧瓶中向精确称重的样品中加入盐酸、纯水和碘化钾，并用塞子密封。将烧瓶置于冷暗室中5分钟以上后，用0.1mol/L硫代硫酸钠滴定游离碘(I2)，以测定三氯化铁浓度。KGMKYOTO ELECTRONICSMANUFACTURING CO.，LTD.TIN-01051enL Application Memo Ferric Salt in Etchant Industry Iron and steel Instrument Automatic potentiometric titrator Measurement method Redox titration Standards JIS K 8142， HG/T 3474 1.Overview The method for measuring the ferric salt concentration in the etchant i s shown below. As a pretreatment， add hydrochloric acid， pure water， and potassium iodide to the precisely weighed sample i n an Erlenmeyer flask， and seal with a stopper. After leaving the f lask in a cold dark room for more than 5 minutes， titrate the free iodine (I2) with 0.1mol/L sodium thiosulfate to determine the ferric salt concentration. 2. Apparatus Main unit Automatic potentiometric t itrator (preampli f ier STD)Electrode Combined platinum electrode 3. Reagents Titrant 0.1mol/L sodium thiosulfate Additive Hydrochloric acid (2+1)， Potassium iodide 4. Example —Measurement results一 Sample Titer FeCl3 (g) (mL) (%) 5.0123 10.7095 34.739 5.0123 10.7095 34.739 5.0123 10.6983 34.703 Average 34.727 SD 0.021 RSD(%) 0.060 16.000 [mL ] —Titration curve一 Please feel free to contact us for any further i nformation. 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