Precautions for using automatic potentiometric titrator
Depending on the frequency of use, titrator equipment such as burettes, pistons, valves, and pipelines should be cleaned more frequently. Always use high-quality ethanol for cleaning.
Depending on the contamination caused by the standard solution, the burette, valves, and tubing should be rinsed with deionized water and then with ethanol.
Dry parts with oil-free compressed air.
There are usually three main problems with an electrode (or sensor) when performing non-aqueous titrations. First is the problem of using aqueous electrolytes in the presence of non-aqueous solvents. Replacing the electrolyte in the electrodes easily solves this problem. The second problem is related to the fact that the sample is non-conductive, which results in a poor electrical circuit between the measuring and reference half-electrode or electrode assembly (if combined). This produces a noisy signal, which is especially noticeable when the electrode is used with a standard ceramic reference junction. This problem can be solved by using the electrode with a sleeved junction (eg: DG113 electrode). The electrode uses lithium chloride ethanol solution as the standard electrolyte, and replaces the ceramic junction with a polymer sleeve, which increases the contact area between the working and reference parts, thereby reducing noise.