润滑油中酸值的测定 应用资料

润滑油中酸值的测定 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，所用的电极对为玻璃指示电极与参比电极或者复合电极。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-99312enL Application Memo Total Acid Number of Lubricant IndustryPetrochemicalsInstrumentAutomatic potentiometric titratorMeasurement methodAcid-base titrationStandardsJIS K2501，ASTM D664，GB/T 7304 1.Overview Measurement of total acid number of lublicants is specified in JIS K 2501-2003“Petroleumproducts and lublicants - Determination of neutralization number". A test sample is usuallydissolved in mixture of toluene， 2-propanol and a small amount of water， and the sample istitrated by potentiometry with 0.1mol/L potassium hydroxide+2-propanol solution. Theendpoint is obtained on the titration curve. The total acid number is calculated from thetitration volume up to the endpoint. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) Electrode Combined glass electrode Double junction reference electrode Temperature compensation electrode 3. Reagents Titrant 0.1mol/L potassium hydroxide +2-propanol solutionSolvent Toluene， Pure water， 2-propanol 4. Example Sample Titer Acid (g) (mL) (mgKOH/g) 1 0.2176 4.3576 112.4 2 0.1936 3.8418 111.3 3 0.2086 4.1693 112.1 Average 111.9 SD 0.5 RSD(%) 0.5 Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd. Overseas Sales & Marketing Sect. 电邮： kemu-kem@163.com