Coulombic Karl Fischer moisture analyzer

Coulombic Karl Fischer moisture analyzerThe usage process mainly includes the following steps:

Preparation work

Pre startup inspection: Ensure that all components of the instrument are connected properly, such as titration cells, electrodes, stirrers, etc., and that the connections are stable. Add an appropriate amount of Karl Fischer reagent to the titration cell, usually to a certain depth below the electrode surface, and add a suitable solvent such as anhydrous methanol to the solvent bottle. Check the sealing of the entire titration system to prevent external moisture from entering and affecting the measurement results.

Instrument preheating: Turn on the instrument power and allow it to preheat for a period of time, usually 15-30 minutes, to reach a stable working state.

Calibration instrument

Calibration of standard aqueous solution: Use a standard aqueous solution with known water content to calibrate the instrument. According to the operating instructions of the instrument, inject an appropriate amount of standard aqueous solution into the titration cell and start the instrument for titration. The instrument will automatically calculate the titration degree based on the amount of electricity consumed during the titration process and the moisture content of the standard aqueous solution. Repeat this operation at least three times and take the average as the titration degree of the instrument to ensure measurement accuracy.

Sample measurement

Sample preparation: Place the test sample into a suitable sample container. If it is a solid sample, ensure that the sample is uniform and free of impurities; If it is a liquid sample, an appropriate amount of sample can be directly extracted with a syringe and injected into the titration cell. For gas samples, it is necessary to introduce the gas into the titration cell through a specific injection device.

Start measurement: Place the container containing the sample above the titration cell or inject the sample according to the specified injection method of the instrument, and then start the measurement program of the instrument. The instrument will automatically start titration and calculate the moisture content in the sample based on the changes in current generated during the titration process.

Data recording and processing

Data recording: After the measurement is completed, the instrument will display the moisture content of the sample. Record the measurement results, including the specific value of moisture content and information such as the measurement time and date. If the instrument has data processing capabilities, the data can be saved to the internal storage of the instrument for subsequent queries and analysis.

Data analysis: Analyze and evaluate the moisture content of the sample based on the recorded data. If multiple measurements are required to improve accuracy, the results of multiple measurements can be averaged.

Cleaning Coulombic Karl Fischer Moisture Analyzer

Cleaning after measurement: After measurement, the titration cell and electrode should be cleaned in a timely manner. The titration cell and electrode can be rinsed with solvents such as anhydrous methanol to remove residual samples and reaction products. Clean thoroughly during cleaning to avoid cross contamination affecting the next measurement.

Regular deep cleaning: According to the frequency of use and manufacturer's recommendations, regularly perform deep cleaning and maintenance on the instrument. This may include disassembling some components for cleaning, replacing desiccants, and other operations to ensure that the performance and accuracy of the instrument are always maintained in optimal condition.