润滑油中水检测方案(卡氏水分测定)

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No.KCA-08001 KEM Application Note No.KCA-08001Coulometric Karl-Fischer titration Kyoto Electronics Manufacturing Co.，Ltd.DataNo.LA47-08130 Moisture of lubricating oil -Summary- Checked the possibility of measuring moisture in lubricating oil by MKC-520 and ADP-513.Consequently， good reproducibility was obtained， but it is considered that measurement wasinfluenced by evaporated component of low boiling point. -Measuring instrument- Main unit：MKC-520 Coulometric KF moisture titratorOption： ADP-513 Evaporator for oil Electrode：M-713 Twin Pt electrode #433-0006Inner burette #433-0006Inner burette -Reagent- Anolyte： Coulomat AG Catholyte： Coulomat CG Carrier gas： Nitrogen -Measurement method- Preparation： (1) Delivered anolyte in titration cell and catholyte in inner burette. (2) Pretitrated for dehydration. (3) Connected MKC-520 and ADP-513， and set the evaporation temperature to 150℃. Measurement： (1) Sample was taken in and measured moisture. -Equation- Moisture(%)： ((Data-Drift×t-Blank)/(Wt1-Wt2))×F/10000 Data： Total water content (ug) t ： measuring time (s) Wt1： Tare included sample weight (g) Drift： Drift(ug/s) Blank： Blank value (ug) Wt2： Tare included residual weight (g) F=1.00： Factor -Ambient condition- Ambient： 25.3 ℃ Humidity： 61% Weather： Fine -Measurement parameter- -Printout data- Time Unit Total 00：01：00 57.7 57.7 00：02：00 64.6 122.3 00：03：00 61.8 184.1 00：04：00 0.01 ug/s 51.9 236.0 00：05：00 42.0 277.9 00：06：00 31.0 309.0 Q0：07：00 24.3 333.2 00：08：00 18.6 351.9 00：09：00 15.3 367.2 00：10100 12.3 379.5 00：11：00 10.2 389.7 00：12：00 8.4 398，1 00：13：00 6.9 404.9 00：14：00 5.7 410.6 00：15：00 5.2 415.8 00：16：00 4.4 420.2 00：17：00 3.8 424.0 00118：00 3.6 427.6 00：19：00 3.3 430.9 00：20：00 3.1 434.0 -Measurement results- Sample size (g) Moisture (ug) Conc.(ppm) Statistics First Second Third 0.21980.2292 0.2261 434.0443.1 433.4 1974.51933.2 1916.9 MeanSD RSD 1941.5 ppm29.690 ppm1.5292% -Comment- It is recommended to reduce sample size and exchange reagent moderately to avoidinterfering sample. 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漕溪路222号航天大厦北楼902室电话：021-54488867 电邮： kemu-kem@163.comn网址： http：//kem.instrument.com.cn