How to replace the reagent of a trace moisture analyzer
When using a trace moisture analyzer and the electrolyte cannot be used, it is necessary to replace the reagent of the trace moisture analyzer. How can we better operate and replace the reagent of the trace moisture analyzer? Below, Jilin Haimai Technology will introduce how to replace the reagent of the trace moisture analyzer
1. Prepare a clean filter paper, remove the two drying tubes of the electrolytic cell and place them on the filter paper; Take out the electrolytic electrode, pour out the electrolyte in the cathode chamber (electrolytic electrode), and then slowly pour out the electrolyte in the anode chamber (electrolytic cell bottle) (be careful not to pour out the stirrer)
In general, it is not necessary to clean the electrolytic cell. After being contaminated, it is necessary to strictly follow (3) for cleaning
3. Cleaning: Electrolytic cell bottles, drying tubes, sealing plugs, and measuring electrodes can be cleaned with anhydrous methanol or other anhydrous solvents, and if necessary, they can also be cleaned with water; The cathode chamber (electrolytic electrode) should not be cleaned with water as much as possible. When cleaning with water, it must be effectively dried. After cleaning, it should be dried in an oven at about 60 degrees Celsius for 4 hours, and then cooled naturally in the oven. Note: the two plugs, wires, and rubber hoses should not touch the cleaning solution during cleaning.
4. Apply a layer of vacuum grease evenly to the grinding surface of the measuring electrode, two drying tubes, injection cock, and sealing port, and install it in the corresponding position. Gently rotate it to ensure a good sealing. Inject approximately 100-120 milliliters of electrolyte into the negative and positive chambers of the moisture analyzer using a funnel to maintain the same liquid level in the negative and positive chambers. The liquid level should reach the mark below the electrolytic cell. Then, install the sealing plug and drying tube, and gently rotate them to ensure a good seal.
5. Insert the measuring electrode plug of the electrolytic cell into the measuring socket of the host, and insert the electrolytic electrode plug into the electrolytic socket of the host. Shake the pool a few times, turn on the electrolysis and stirring keys, and if it is in a state of excessive iodine, use 50 μ 1. Inject an appropriate amount of pure water into the electrolytic cell (the needle should be inserted into the liquid surface) using the injector, and observe the color of the electrolyte at any time until counting begins. Turn off the stirring and evenly shake the electrolytic cell to fully react with the moisture and electrolyte in the air inside the cell. Then turn on the stirring and allow the instrument to reach the endpoint again, and then proceed with the sample injection test.
6. The storage color of the electrolyte is brownish red or brownish black. The color is light yellow during normal use.
7. Failure of electrolyte: If there are two of the following three conditions, it may fail. (1) Use the electrolyte for at least one month; (2) The color of the electrolyte darkens (in non iodine state); (3) The electrolysis process is difficult to reach the end point [after repeatedly shaking the electrolysis cell several times according to step 5].
8. When it is difficult to reach the endpoint during use due to high environmental humidity, hot air, frequent sampling, leakage of the silicone pad at the injection port, or difficulty in dissolving solid samples, simply shake the electrolytic cell evenly according to (5).
9. Attention: When changing reagents, be careful not to inhale or touch the reagents with your hands. If in contact with the reagents, rinse them thoroughly with water. Due to the strong odor and toxic components of the reagent, the ventilation in the laboratory should be good.
