How to change the reagents of a trace moisture tester
In the use of trace moisture tester when the electrolyte can not be used, you need to replace the reagents of the trace moisture tester, how to better operate and replace the reagents of the trace moisture tester? The following Jilin Haimai Technology to introduce how to replace the reagents of the moisture meter.
1. Prepare a clean filter paper, remove the two drying tubes of the electrolysis cell and put them on the filter paper; take out the electrolysis electrode, pour out the electrolyte in the cathode chamber (electrolysis electrode), and then pour out the electrolyte in the anode chamber (electrolysis cell bottle) slowly (pay attention to not pouring out the stirrer).
2. Generally there is no need to clean the electrolytic cell. After being contaminated need to be strictly operated according to (3), to clean.
3. Cleaning: electrolytic cell bottle, drying tube, sealing plugs, measuring electrodes can be anhydrous methanol and other anhydrous solvents, if necessary, can also be cleaned with water; cathode chamber (electrolytic electrodes) as far as possible not to use water to clean, if cleaned with water, it must be effective drying, cleaning and drying in an oven at about 60 degrees Celsius for 4 hours, and then naturally cooled in the oven. Note: When cleaning the two plugs, wires and rubber bubbles can not touch the cleaning solution.
4. In the measurement of the electrode, two drying tube, sample plug, sealing the mouth of the abrasion, evenly coated with a layer of vacuum grease will be mounted to the appropriate position, gently rotate it to make a better seal. About 100-120 ml of electrolyte with a funnel were injected into the cathode and anode chamber of the moisture tester, so that the cathode and anode chamber of the liquid level to maintain the same level of liquid height to the electrolytic cell under the scale can be, and then the sealing plugs, drying tubes, gently rotate a little, so that it is better sealed.
5. Insert the measuring electrode plug of the electrolysis cell into the measuring socket of the host, and the electrolysis electrode plug into the electrolysis socket of the host. Shake the cell a few times, turn on the electrolysis and stirring keys, if it is in the over-iodine state at this time, use a 50μ1 feeder to draw an appropriate amount of pure water to inject into the electrolysis cell (the needle should be inserted into the liquid surface), and observe the colour of the electrolyte at any time until it starts counting. Switch off the stirring, shake the electrolytic cell evenly, so that the moisture in the air in the electrolytic cell and the electrolyte react fully, and then switch on the stirring, so that the instrument reaches the end point again, and then you can carry out the sample injection test.
6. The colour of electrolyte is brownish red or brownish black. The colour is light yellow in normal use.
7. Failure of electrolyte: two of the following three conditions may fail. (1) The electrolyte has been in use for more than one month; (2) The electrolyte becomes dark in colour (not in a state of over-iodination); (3) It is difficult to reach the end of the electrolysis process [after shaking the electrolytic cell evenly several times in accordance with the procedure in step 5].
8. If the end point is not easy to be reached due to high humidity, hot and humid air, frequent sampling, leakage of silica gel pad at the inlet, or insoluble solid samples, the electrolysis cell can be shaken evenly according to (5).
9. Note: Be careful when changing the reagent, do not inhale or touch the reagent with your hands, if you are in contact with the reagent, it should be effectively rinsed with water. Since the reagent has a strong odour and contains toxic components, the test chamber should be well ventilated.
