环己烷中溴值的测定 应用资料

环己烷中溴值的测定 应用资料 将已知质量的试样溶解于温度维持在0℃～5℃的溶剂中，然后用溴化钾-溴酸钾标准溶液滴定。当溶液中出现的游离溴引起电位滴定仪的电位突然改变时，即表示达到滴定终点。KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.TIR-93009enL Application Memo Bromine Number of Cyclohexane 1.Overview According to JIS K 2605-1996 Petroleum distillates and commercial aliphatic olefins -Determination of bromine number -Electrometric method， bromine number of cyclohexane ismeasured by titration with potassium bromide-potassium bromate solution while the testsample dissolved in buffer is maintained at 5℃ or less. The endpoint is determined by theinflexion caused by sharp polar potential change due to free iodine in titration. The brominenumber is calculated from the titration volume of potassium bromide- potassium bromatesolution. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier POT)Electrode Twin platinm electrode 3. Reagents Titrant 0.25mol/L-potassium bromine-potassium bromate solutionSolvent Acetic acid， Toluene， Methanol， Sulfuric acid (1+5) 4. Example -Measurement results- Bromine 1 0.7143 3.3214 186.0 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