醇类样品中水分含量检测方案(卡氏水分测定)

KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.KVX-01221enL-KM KYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoMoisture of Alcohols Industry Organic Chemical Instrument Karl Fischer Moisture Titrator Measurement method Volumetric Titration (Direct Method) Standards JIS K 0113，ASTM E 203， ISO 760 1. Overview Moisture titration using Karl Fischer reagent is popularly practiced water determination worldwide asthe most reliable method. The procedure is adopted in many official standards as test method specifiedin ISO， ASTM， DIN， BS and JIS. Here in this application， water content of alcohols is determined by volumetric titration according to JISK 0113-2005 as quoted below. Generally the alcohols are easy to dissolve in water， for which we use KEMAQUA MET solvent asextracting medium. The samples we have tested are as follows： Methanol/ Ethanol/ n-Butanol/ Isobutanol/ Secondary butanol/ Tertiary butanol/ 1-propanol/ 2-propnaol/ n-amyl alcohol/ Isoamyl alcohol/ Tertiary amyl alcohol/ Propargylic alcohol/ Benzyl alcohol/ n-hexyl alcohol/ Ethylene glycol/Propylene glycol/Glycerin， etc. 2.Apparatus Main unit Karl Fischer moisture titration volumetric system Electrode Twin platinum electrode for KF titration 3. Reagents Titrant KEMAQUA TR-3 and 5 (Kyoto Electronics)Solvent Extracting medium MET (for general purpose) (Kyoto Electronics) 4. Example Measurement results- Sample name Water content (mg) (%) Methanol 1.35 0.017 Ethanol 8.72 0.221 n-Butanol 0.81 0.009 Isobutanol 1.69 0.021 Secondary Butanol 6.63 0.082 Tertiary Butanol 3.19 0.041 1-Propanol 3.70 0.046 2-Propanol 1.73 0.022 n-Amyl Alcohol 1.14 0.014 Sample name Water content (mg) (%) Isoamyl Alcohol 4.06 0.050 Tertiary Amyl Alcohol 6.71 0.083 Propargylic Alcohol 50.45 0.532 Benzyl Alcohol 4.88 0.047 n-Hexyl Alcohol 1.63 0.020 Ethylene Glycol 3.31 0.033 Propylene Glycol 3.32 0.032 Glycerin 2.90 0.554 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 醇类样品的水分测定 应用资料(英文版)使用卡尔费休试剂进行水分滴定是世界范围内普遍采用最可靠的水分测定方法。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采用。在此应用中，根据GB/T 6283，通过容量滴定法测定醇类的含水量。测试的样品如下:甲醇/乙醇/正丁醇/异丁醇/仲丁醇/叔丁醇/1-丙醇/2-丙醇/正戊醇/异戊醇/叔戊醇/炔丙醇/苯甲醇/正己醇/乙二醇/丙二醇/甘油等。