Just like any machine, titrators need a little maintenance; such as replacing certain parts (like changing your car's brakes), to remain in tip-top shape.
Both potentiometric and Karl Fischer titrators have parts that will wear down with time and use. Some of this is just due to mechanical wear and tear, but exposure to chemicals and/or samples will also degrade parts. To avoid leaks and degradation, and to maintain instrument accuracy, it is recommended to replace the wearable parts on a regular basis.
Potentiometric Titrators
Wearable parts for potentiometric titrators include aspiration tubing, dispensing tubing, and the burette syringe.
Volumetric Karl Fischer Titrators
Wearable parts for volumetric Karl Fischer Titrators include aspiration tubing, dispensing tubing, burette syringe, sepa, and O-rings.
Coulometric Karl Fischer Titrators
Wearable parts for coulometric Karl Fischer titrators include glass joint grease, septa, and O-rings.
When to Replace the Syringe and Tubing
Syringe (Inside the Burette) |
|
| Titrant | Replacement Frequency |
| Caustic < 1N | 1 Year |
| Caustic > 1N | 6 Months |
| Non-aqueous | 1 Year |
| Any titrant > 1N | 1 Year |
| Most others | 2 Years |
Tubing |
|
| Titrant | Replacement Frequency |
| Titrants that crystalize (e.g. silver nitrate) | 3 - 6 Months |
| Most others | 1 Year |
Did you know that Hanna Instruments offers service plans to help keep your titrators in running order? Check them out here!