Trace Moisture Meter Frequently Asked Questions
1, the anode electrolyte colour is not bright yellow, but between brown and dark yellow.
Reason: moisture meter electrolyte colour is too dark, is the electrode on the electrolyte response ability to reduce.
Solution: you can use paper towels to clean the double platinum needle electrode to remove the surface of the adsorbent; check whether the measurement electrode is normally connected; the measurement electrode may be malfunctioning.
2,Pre-titration of fresh anode electrolyte, the drift is too high
Reason: There is residual water in the titration system.
Solution: you can replace the molecular sieve and silica gel in the drying tube, check whether the electrode interfaces and plug interfaces of the titration table are tight; you can apply silicone grease on some loose interfaces.
3,Why the drift is too high during standby titration?
Reason: The water in the cathode pool penetrates into the anode pool through the diaphragm.
Solution 1: Replace the electrolyte in the anode cell; add a small amount of one-component volumetric Karl Fischer reagent to the cathode cell for drying; keep the liquid level of the anode liquid higher than the liquid level in the cathode cell.
Solution 2: Clean the titration cup effectively to remove the continuous side reaction caused by the sample left over from the last test; check the sealing of the titration system.
4,High drift value after sample titration
Reason: The test sample has a side reaction with the anode electrolyte and the reaction produces water.
Solution 1: Replace other kinds of anode electrolyte or replace other sample pretreatment methods
Solution 2: Some volatile components in the sample are allowed to react with the Karl Fischer reagent.
Solution 3: Improve the sample pretreatment method.
5,Long titration time, titration does not stop
Reason 1: Improper selection of control parameters.
Solution: Relative drift termination can be used as the end parameter, increase the relative drift termination value, increase the end point.
Reason 2: Anode electrolyte conductivity is too low.
Solution: Need to replace the anode electrolyte.
