Maintenance of the electrode of the micro-moisture tester
Electrode is the key component of the trace moisture tester, electrode surface contamination can directly lead to sensitivity reduction. Therefore, the maintenance of the electrode of the trace moisture detector is very important.
When the sensitivity is reduced, the electrode is seriously contaminated. Paper can be dipped in a little acetone to wipe the electrode, but need to be careful, but also need to wait for the acetone volatilisation completely before use. Or the electrode can be immersed in dilute nitric acid solution for 24 hours, then removed, rinsed with water and wiped with filter paper. The electrode can also be washed with potassium dichromate solution for l minute to activate the electrode. In special circumstances, such as samples waiting to be analysed, cleaning the electrode time is not allowed, then available in an emergency solution to the electrode contamination of the incident. With very fine sandpaper gently rub the ends of the electrode, filter paper wiped clean, you can see the effect.
Instrument such as a period of time without using, should be electrolytic cell in the Karl Fischer reagent all rows, in order to avoid the reagent volatilisation caused by crystallisation and clogging of the pipeline, the electrode swabbing. In the testing of the instrument can often be found, the operator of the sample determination of the end of the power off, the maintenance of the instrument and the accuracy of the measurement should be closely related to the lack of awareness of the problem.
