库仑法卡尔费休水份仪MKC-520测定丙酮中水分含量En

No.KCZ-06071上海旭风科学仪器有限公司 上海市闸北区万荣路388弄17号904室 200072Tel： 021-66581985，63172460 Fax： 021-66581986 周峰13916388882 zhou-feng1027@163.com KEM Application Note KCZ-06071Coulometric Karl Fischer titration Kyoto Electronics Manufacturing Co.， Ltd. Data No.LA39-06053 Moisture measurement on Acetone -SSummary- As the result of the feasibility study of the moisture measurement for acetone by MKC-520， agood repeatability was observed. Therefore， this measurement is judged possible. -Measuring instrument- Main unit： MKC-520 Coulometric KF moisture titrator Electrode：M-712 Twin Platinum Electrode #433-0048 Inner burette (one chamber) -Reagent- Anolyte： Coulomat AK -Measuring method- Preparation： (1) Put 150mL of Anolyte in the titration cell. (2) Pre-titrate it for dehydration. Measurement：(1) Take approximately 0.75g of the sample with the syringe and measure the moisture of it. -Equation- Moisture(%)：((Data-BGxt-Blank)/(Wt1-Wt2))/ 10000 Data： Total water content (ug) t ： Measuring Time (s) Wt1： Tare including sample weight (g)BG： Background value (ug/s) Blank： Blank value(ug) Wt2： Tare including residual weight (g) -Ambient conditions- Temperature： 25.8°℃ Relative Humidity： 53% Weather： Fine 上海旭风科学仪器有限公司 上海市闸北区万荣路388弄17号904室 200072 Http：//www. shxf17.com Tel： 021-66581985，63172460 Fax： 021-66581986 周峰13916388882 zhou-feng1027@163.com -Measurement parameter- -Printout data- [TITR.PARA1 Method 1 Titr. Cell No.1 t(Stir) 0s t(Wait) 0s t(Max) 0s Drift Stop Rel 0.1 ug/s Cont.Gain 5.0 Stable 0.1 pg/min Start Auto Oven Off [CALCU.PARA1 Calc.No. 2 Unit ：% Weight ：Variable Drift Comp ： Auto ***Result*** Sample No. 01-01 Date 2006/03/04 13：50 Titr. Cell No.1 Wt1 0.7619 gWt2 0.0000 g Net 0.7619 g Result 1470.9 ug0.1931% ***Result** * Sample No. 01-02 Date 2006/03/04 14：10 Titr. Cell No.1 Wt1 0.7966 gWt2 0.0000 g Net 0.7966 g Result 1525.2 ug 0.1915% ** *Result*** Sample No. 01-03 Date 2006/03/04 14：24 Titr. Cell No.1 Wt1 0.7401 gWt2 0.0000 g Net 0.7401 g Result 1419.6 ug 0.1918% -Measurement results- Run Sample size (g) Moisture(ug) Conc.(%) Statistics 1234 5 0.76190.79660.74010.70040.8232 1470.91525.21419.61340.7 1587.3 0.19310.19150.19180.1914 0.1928 MeanSD RSD 0.1921 %0.0008 %0.4020 % -Comments- A reagent compatible with ketone is used as Anolyte in order to deter the formation ofwater by reaction with the ketone group in the sample. For your reference， an alternativemethod to deter this side reaction is to make measurements while cooling the measuringcell. Http：//www.shxf17. com