(1) The entire system is enclosed. In order to prevent test results from being impacted by reagent leakage, the Karl Fischer reagent liquid circuit must be tightly connected from the reagent bottle to the metering pump to the reaction tank. Another element of its lack of airtightness is that the Karl Fischer reagent absorbs moisture from the experiment's air during the test, delaying the titration's end point.
(2) The issue of precise moisture measurement instrument sampling. It is vital to utilize a 10ul sampler, which is not only precise and quick but also prevents the adherence of water droplets, when calibrating Karl Fischer reagent. Ethyl esters and the use of methanol reagents have similar drawbacks. After taking and placing, care should be taken to reduce the response pool's opening time as much as feasible.
(3) Changing the speed of magnetic stirring. The stirring speed is preferable to be fast enough not to generate turbulence in the reaction tank since the titration reagent is injected locally rather than in the same location as the electrode. This allows for quick arrival at the end point.
(4) The moisture measuring device's titration speed option should be adjusted to fast first and then slow later. When titrating, attempt to test as quickly as you can, and when you get close to the finish point, try to slow down to improve the measurement degree.
(5) Karl Fischer reagent in the system needs to be drained and then washed with methanol when the moisture meter experiment for the day is finished. Never rinse the moisture meter system with water as this will make the following experiment difficult to volatilize. The calibration of the Karl Fischer reagent is inaccurate.
(6) To avoid the electronic display leaping when operating and creating abnormal conditions, the moisture measuring device should be maintained away from the strong magnetic field. Karl Fischer reagent and methanol solvent must be measured using a glass automatic burette, and the glass burette itself needs to be connected to the outside environment due to the relationship between the equilibrium pressure.
(7) Keep the pieces as airtight as you can. To maximize the impact of air moisture on the test findings, the manual moisture meter needs to add a U-shaped tube filled with desiccant to the top of the suction bulb pipe and the glass burette. Moisture testing ought to be avoided as much as feasible when the relative air humidity is above 70%.
(8) It is preferable to set the burette's titration speed at 1 drop per second. If the titration speed is too slow, the test procedure will take longer and the above interference will likely result in a delay when reaching the end point. If the titration speed is too rapid, the delay error will be bigger when reaching the starting point.
