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Kyoto Electronics Manufacturing Co.， Ltd.Data No.LN38-090429上海市漕溪路222号航天大厦北楼902室网址： http：//www.kyoto-kem.net.cn电话：021-54488867 电邮： kemu-kem@163. com KEM Application Note No.EKCR-090429Coulometric Karl-Fischer Titration Moisture of Methyl ethyl ketone ·Summary- Checked the possibility of measuring moisture of Methyl ethyl ketone with MKC-520 andgood repeatability was obtained. -Measuring instrument- Main unit： MKC-520 Coulometric KF moisture titrator Electrode： M-713 Twin platinum electrode #433-0006Inner burette -Reagent- Anolyte： Coulomat AK Catholyte： Coulomat CG-K -Measurement method- Preparation： (1) Fill the titration cell with the anolyte and the inner burette with the catholyte. (2) Pretitrate for dehydration. Measurement： (1) Place about 0.1g sample in the titration cell with syringe for the moisture measurement onthe sample. -Equation- Moisture (%)： ((Data-Driftxt-Blank)/(Wt1-Wt2))xF Data ： Measured water content (ug) Drift ： Drift before measurement (ug/s)t：Measuring time(s) Blank ： Blank value (ug) Wt1 ： Tare including sample weight (g) Wt2 ： Tare including residual weight (g) F ： Factor (1.00) ·Standard method- Karl Fischer method -Ambient conditions- Temperature： 26°℃ R. Humidity： 42 % Weather： Fine 京都电子工业株式会社-可睦电子(上海)商贸有限公司 Titration] Method 2 t(stir) 0s t(wait) 15s t(max) 0s Drift Stop ： IRel 0.1 ug/s Cont. Gain 5.0 Stable 0.1 ug/min Start ：1Manual Oven ：Off 「Calculation] Clac. No. 2 Unit Weight ：%：\Variable Drift Comp.： Auto [Data Listl Data Samp. Time 30 sDisplay ： Off Print Meas.Data： Off Print Graphic ： Off Resy.lttX* Date 09/04/2912：38 SamPle No. 01-02WI 0.07339W12 0 Net 0.0733 Result 107.1L19 0.1461% 关关Resi Ii E关关关 Date 09/04/29 12：39 Samele No. 01-03It1 0.0969寸+2 0gNet 0.09699Resu1t 138.6 u0.1430 **XResul t 光光 Date 09/D4/2912：40 Samele No， 01-04Wtl 0.12379W+2 09Net 0.1237 Result 178.8US D.1445 -Measurement results- Run Sample size(g) Moisture(ug) Concentration(%) Statistics 123 0.0733 0.0969 0.1237 107.1138.6 178.8 0.14610.1430 0.1445 MeanSD RSD 0.1445%0.0016% 1.0726% -Comments- -Comments- 京都电子工业株式会社-可睦电子(上海)商贸有限公司电话：021-54488867 电邮： kemu-kem@163.com 上海市漕溪路222号航天大厦北楼902室网址： http：//www.kyoto-kem.net.cn