酮类样品中含水量检测方案(卡氏水分测定)

KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.KVX-01301-enL-KcM KYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoWater Content in Ketone (1) 1. Overview Moisture titration with Karl Fischer reagent is the most reliable moisture measurementmethod in the world. The procedure is adopted in many official standards as test methodspecified in ISO，ASTM， DIN， BS and JIS. Here in this application， we measure water content of ketone by direct method ofKFtitration according to JIS K 0113. The ketones induce side reaction of generating water withalcohol like methanol. R2CO+2ROH→R2C(OR)2+H2O However， the side reaction can be avoided by titration with commercially sold solvent forketone. 2. Apparatus Main unit Karl Fischer moisture titration volumetric system Electrode Twin platinum electrode 3. Reagents Titrant KEMAQUA titrant TR-3Solvent KEMAQUA solvent KET for ketone 4. Example -Measurement results- Sample name volume Maxvolume content Water content mg % 2-pyrrolidone 10mL 3.77 0.06 N-methyl-2-pyrrolidone 10mL 1.15 0.02 2-benzoylpyridine 10g 0.45 0.02 3-acetylindole 2g 1.73 0.34 Diacetyl 1mL 0.48 0.10 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 酮类样品含水量的测定(1) 应用资料(英文版)卡尔费休滴定法是世界上公认可靠的水分测量方法。该程序为GB、ISO、ASTM、DIN、BS和JIS中规定的试验方法，被许多官方标准所采用。在此应用中，我们根据GB/T 6283通过直接电量滴定法测量酮类样品的含水量。酮类化合物会与甲醇等醇类发生水生成副反应。然而，使用市售的卡尔费休醛酮试剂滴定可避免副反应。