Treatment of Ground Joint Bonding in Titration Cell of Trace Moisture Analyzer, Electrode Maintenance, and Cleaning of Cathode Chamber



Treatment of ground joint bonding in titration cell of trace moisture analyzer, electrode maintenance, and cleaning of cathode chamber:

1. Treatment of ground joint bonding in titration cell of trace moisture analyzer

If the ground joint connection of the titration cell is firmly bonded and difficult to disassemble, follow the procedure below:

1. Drain the electrolyte from the titration cell and rinse it clean.

2. Inject a small amount of acetone around the ground joint, then gently rotate the parts at the ground joint by hand to disassemble.

3. If it still cannot be disassembled, place the titration cell in a 2-liter beaker, slowly add a 5% potassium chloride solution to soak. Be very careful not to let the lead wire sleeves of the measuring electrode and cathode chamber electrode enter the liquid. After soaking for about ten hours or 24 hours, it can be disassembled (this method can be repeated).

2. Maintenance of the measuring electrode of the trace moisture analyzer

1. When the magnetic stirrer rotates rapidly, note that the stirring bar may jump and damage the electrode.

2. When inserting or removing the measuring electrode, press the stirring switch to stop stirring, and be careful not to let the measuring electrode touch the wall of the titration cell hole.

3. If the measuring electrode is bent but not short-circuited, it can still be used. For repair, use tweezers to hold the root of the platinum electrode and slowly adjust the tip of the platinum electrode.

4. When the measuring electrode is contaminated, wipe it with acetone. If the dirt on the platinum wire cannot be removed, use an alcohol lamp flame to burn the platinum wire ball end (please slowly bring the flame close to the platinum wire ball end to avoid cracking the glass part of the electrode due to rapid heating).

3. Cleaning of the cathode chamber

(1) Reduce electrolysis efficiency and prolong measurement time.

(2) Due to the adhesion and absorption of moisture by the contaminated parts, the blank current increases.

(3) The titration speed is unstable and the endpoint cannot be reached.

If the above situations occur, use acetone to clean the dirt on the outer surface of the glass parts and the platinum mesh (be careful not to damage the platinum wire and platinum mesh). Fill the cathode chamber with acetone, seal the interface of the drying tube with a rubber stopper or similar, shake thoroughly to remove internal dirt (can be repeated). Then pour acetone over the outer surface of the entire glass parts to rinse, but do not rinse the electrode lead wires. If it still cannot be cleaned, immerse the cathode chamber in a beaker containing dilute sulfuric acid.