汽油中酸值的测定 应用资料

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汽油中酸值的测定 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，如果没有明显突跃点则以相应的新配水性酸和碱缓冲溶液的电位值作为滴定终点。TIA-98002enL-K-MKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application Memo Total Acid Number of Gasoline 1.Overview Measurement of total acid number of petroleum products is specified in JIS K 2501-2003“Petroleum products and lublicants - Determination of neutralization number”. A test sampleis usually dissolved in mixture of toluene， 2-propanol and a small amount of water， and thesample is titrated by potentiometry with 0.1mol/L potassium hydroxide +2-propanol solution.The endpoint is obtained on the titration curve. The total acid number is calculated from thetitration volume up to the endpoint. 2. Apparatus Main unitAutomatic potentiometric titrator (preamplifier STD) Electrode pH 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 number (g) (mL) (mgKOH/g) 1 5.0130 2.3656 2.6473 2 5.0136 2.4130 2.7000 3 5.0123 2.4314 2.7213 AverageSD 2.6895 0.0381 RSD(%) 1.41 -Titration curve— 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