Differences and differences between volumetric method and Coulometric moisture analyzer The biggest difference is that the source of I2 is different. I2 in the volumetric method comes from the titrant, while in the coulometric method, I2 is produced by electrolyzing the electrolyte containing I-ion. The speed of electrolysis is limited, so when the moisture content of the sample to be measured is relatively low, the Karl Fischer Coulometric moisture meter is not only fast, but also has good parallelism. The amount of electricity passing through the electrolytic cell is strictly proportional to the amount of I (iodine), so the coulometric method has a higher measurement accuracy. Therefore, for applications, the volumetric method is more suitable for the measurement of samples with high moisture content, while the Coulomb's law is only suitable for the determination of trace and trace water. Karl Fischer capacity method moisture analyzer, the structure is relatively simple, the accuracy is good, suitable for the determination of moisture content 10PPm-10%, generally used in the chemical, pharmaceutical and packaging industries that have strict requirements on water, it can be seen that For general liquid chemical products, when measuring the moisture content, the Karl Fischer capacity method moisture analyzer should be used, which can meet the requirements of dozens of times per day or less, and the economy is better. One of the characteristics of the instrument is that it can be visually observed to see if the instrument is normal (light brown at the end of the titration). Karl Fischer Coulometric moisture analyzer, the main principle: the use of chemical reaction after the change of conductivity calculation, complex structure, large volume, high accuracy of measurement, suitable for the determination of moisture content below 100PPm (0.01%). It is generally used for the determination of chemical, pharmaceutical and other industrial products with very strict requirements on water, such as anionic polymerization. The price is high. This type of instrument has a bad feature, that is, it is not easy to find a balance when replacing the solvent. More suitable for multi-frequency testing hundreds of times a day. Peppermint Toothpaste,Peppermint Based Toothpaste,Peppermint Oil Toothpaste,Natural Peppermint Toothpaste Shenglong Co.,Ltd , https://www.sl-oralcleaning.com
Differences and differences between volumetric method and Coulometric moisture analyzer