煤油中酸值的测定 应用资料

煤油中酸值的测定 应用资料将试样溶解在滴定溶剂中，以氢氧化钾异丙醇标准溶液为滴定剂进行电位滴定，所用的电极为复合电极。自动绘制电位mV值对应滴定体积的电位滴定曲线，并将明显的突跃点作为终点。KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.TIA-99001enL Application Memo Total Acid Number of Kerosene 1.Overview Measurement of total acid number of petroleum products and lubricant is specified in JIS K2501-2003“Petroleum products and lublicants -Determination of neutralization number”.A test sample is usually dissolved in a mixture of toluene， 2-propanol and a smallamount of water， and the sample is titrated by potentiometry with 0.1mol/L potassiumhydroxide+2-propanol solution. The endpoint is obtained on the titration curve.The total acid number is calculated from the titration volume up to the endpoint. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD)Electrode pH glass electrodeDouble junction reference electrode Temperature compensation electrode 3. Reagents Titrant 0.1mol/L potassium hydroxide +2-propanol solution Solvent Toluene， Pure water， 2-propanol Sample Titer Acid (g) (mL) (mgKOH/g) 19.8491 0.3545 0.05323 2 19.4800 0.3306 0.04599 3 19.4144 0.3378 0.04823 Average 0.04915 SD 0.00371 RSD(%) 7.54 -Titration curve一 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