Reagents should be replaced every time. In this method, the water content is converted according to the injection amount of Karl Fischer reagent and the dropping amount of reagent. Because Karl Fischer reagent is affected by environmental humidity, illumination and sealing, the titration degree changes at any time, which leads to titration error. In the process of measurement experiment, the waste liquid of the last experiment should be discharged at one time, and the new Karl Fischer reagent should be titrated again, which pollutes the environment, consumes a lot of reagents, and has complicated operation and low measurement accuracy. The automatic volume microfluidic analyzer also needs the above steps, only adding the functions of automatic titration and automatic discharge of waste liquid.
Karl Fischer moisture analyzer means that under the condition of electrolytic cell balance, it only needs one operation step, that is, when the sample contains moisture, the instrument will automatically reach balance, convert moisture according to electrolytic power consumption, and automatically display digital results on the instrument, thus improving the accuracy and precision of the instrument. The measurement speed is fast. Coulomb reagent can be used continuously for a long time after being added once without frequent replacement. Less reagent consumption, low measurement cost and simple operation.
According to the above, it can be seen that Coulomb method and Bical Fisher volumetric method of trace moisture analyzer are relatively common and convenient. More accurate measurement, lower cost and more environmental protection.
Defendant: Huatian Electric Power