容量法卡尔费休水分仪测定表面活性剂(洗手液)中水分含量

Kyoto Electronics Manufacturing Co.， Ltd.Data No. LG38-06060 No.EKVE-06087电话：021-54488867 电邮： kemu-kem@163.com KEM Application Note No.EKVE-06087 Volumetric Karl-Fischer Titration Moisture in surface-active agent (handsoap)by Directmethod -Summary- Checked the possibility of measuring the moisture in surface-active agent with MKA-520，and good repeatability was obtained. -Measuring instrument- Main unit：MKA-520 Volumetric KF moisture titrator Electrode： M-714 Twin platinum electrode -Reagent- Titration reagent： Composite 5 (f=4.8457mgH20/mL) Dehydrating solvent： Dehydrating solvent MS -Measurement method- Preparation： (1) Fill the titration vessel with dehydrating solvent MS. (2) Pretitrate for dehydration. (3) Determine the factor of the titrant. Measurement： (1) Collect the sample with a syringe. (2) Place 0.02g (three drops) of sample in the titration vessel for the moisture measurementon the sample. -Calculation- Moisture (%)=((DataxF-Driftxt-Blank)/(Wt1-Wt2))x0.1 Data： Volume at EP (mL) Blank ： Blank value (mg) F ： Factor of titrant (mg/mL) Wt1 ： Tare including sample weight (g) Drift ： Drift before measurement (ug/min) Wt2： Tare including residual weight (g) t ： Measuring time (min) -Official standard method- Karl Fischer method-Ambient conditions- Temperature： 23.5°C R. Humidity： 59 % Weather： Cloudy 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市漕溪溪222号航天大厦北楼902室 电话：021-54488867 电邮： kemu-kem@163.com 网址：http：//www.kyoto-kem.net.cn -Measurement parameter- -Printout data- Titration1 Method 1 Titr Mode 1 Titr Buret No. 2 End Time 30 s Final Vol. 0.01 mL Titr Speed Slow Detector Mode 1 t(stir) 120 s t(wait) 10 s t(max) 0s Drift Titr ： On Start ： Manual Max.Volume： 20 mL Dose mode ： Off Oven Off Oven Temp. Off [Calculation1 Calc. No. 2 Unit % Weight ： Variable Drift Comp.： Off Data List] Data Samp. Time 30 s Data List ： Off Graphic Form： Off * **Result*** Sample No. 02-01 Date 2006/06/1209：27 Wt1 0.0247 gWt2 0g Net 0.0247 g Blank 0.0 mg Result 83.181% Bur. No.24.240 mL 20.546 mg Titr. Time 00：06： 19 ***Result*** Sample No. 02-02 Date 2006/06/1209：39 Wt1 0.0217 gWt2 0g Net 0.0217 g Blank 0.0 mg Result 82.511% Bur. No.23.695mL 17.905 mg Titr. Time 00：04：56 ***Result*** Sample No. 02-03 Date2006/06/1209：52 Wt1 0.0211 gWt2 0g Net 0.0211 g Blank 0.0 mg Result 82.561% Bur. No.23.595 mL 17.420 mg Titr. Time 00：04：22 -Measurement results- Run Sample size(g) Titer(mL) Moisture(%) Statistics 123 0.0247 0.0217 0.0211 4.240 3.695 3.595 83.181 82.511 82.561 MeanSD RSD 82.751% 0.3732% 0.4510% -Comments- Replace the dehydrating solvent for each measurement for some samples. Dehydratingsolvent MS was used for this measurement because the sample was basic. Coulometricmethod is effective if the sample does not dissolve in dehydrating solvent. 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室网址： http：//www.kyoto-kem.net.cn