酮类样品中含水量检测方案(卡氏水分测定)

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KGMKYOTO ELECTRONICSMANUFACTURING CO.，LTD.KVX-01304enL-KcM KYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoWater Content in Ketone (3) IndustryOrganic chemical industryInstrumentKarl Fischer moisture titratorMeasurement methodVolumetric titration (Direct Method)StandardsJIS K 0113，ASTM E 203， ISO 760 1. Overview Moisture titration with Karl Fischer reagent is the most reliable moisture measurement method inthe world. The procedure is adopted in many official standards as test method specified in ISO，ASTM， DIN， BS and JIS. Here in this application， we measure water content of ketone by direct method of KF titrationaccording to JIS K 0113. The ketones induce side reaction of generating water with alcohol likemethanol. 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 Solvent KEMAQUA solvent KET for ketone 4. Example -Measurement results- Sample name volume Maxvolume Water content (mg) (%) acetone Pyruvic acid 1mL 2.39 1.07 2-ketobutyric acid lg 3.30 0.95 Levulinic acid 10mL 4.05 0.22 3-benzoyl-propionicacid 5g 0.46 0.020 1，2-cyclohexoicacid lg 3.00 0.90 Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd. Overseas Sales & Marketing Sect. 酮类样品含水量的测定(3) 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。