How do I clean the glassware? Which chemicals should I / shouldn’t I use?

Under normal circumstances the titration cell can be used for a large number of samples before having to replenish the reagents. Once the reagents have been exhausted, or when the titration cell maximum volume has been reached, it should simply be necessary to:-
1. DISASSEMBLE titration cell (disconnect leads from titrator)
2. EMPTY the titration cell and generator electrode
3. RINSE all parts with methanol. Do not use brush on electrodes.
4. DRY all parts
5. REASSEMBLE glassware
6. RECHARGE with fresh reagents

If the cell is heavily contaminated then it may be necessary to clean it more thoroughly. For oil samples, cleaning with chloroform or xylene is suggested, whilst for salt deposits a water wash may be required. Use whichever solvent is most suited for the sample type. The titration vessel (not the electrodes) can even be cleaned with hot soapy water and a bottle-brush. However, after cleaning with suitable solvent, all glassware parts, should be rinsed inside and out with methanol. They can then be dried with a warm air blower, such as a domestic hair dryer, placed in a low temperature oven at 40 – 50 ° C, or left in a desiccator.

After being fully dried, reassemble the titration cell and charge with fresh reagents.

THE MORE THOROUGHLY THAT THE TITRATION CELL IS CLEANED AND DRIED, THE FASTER THE INSTRUMENT WILL STABILISE READY FOR OPERATION AFTER RECHARGING REAGENTS.

Under normal conditions, the Aquamax KF should be ready for operation within 5 – 10 minutes after reassembly, however it could take considerably longer to completely stabilise if the drying procedure has not been properly carried out.

Posted in: Practical advice