ZSD-2 Automatic Water Titrator Operation Procedure

1. Add anhydrous methanol into the cuvette through the feed hole. The amount of basic immersed electrode platinum plate is appropriate. 2. Turn on the power switch, turn the three-way valve to “Injection” position (injection indicator light), press “Injection “ ” key, the upper limit of piston displacement on the pump pipe is automatically stopped, and then the three-way valve is set to “Aspirate” position (the aspiration indicator is on). Press the “Aspirate” button to start inhaling Karl Fischer test solution from the bottle together. , to the lower limit is the instrument automatically stop the suction 3. Three-way valve to the "injection" bit, according to the "titration" button, automatic blank titration of the methanol in the cuvette (at the same time discharge the bubble), titration to the end of the automatic stop, At the same time, the buzzer sounds, and multiple blank titrations completely eliminate the water in the cuvette (press “reset” key before pressing “titration”)

4. Karl Fischer test solution calibration: accurately weighed 10mg distilled water, injected into the reaction cup with a micro sample injector, press the "titration" button to start the titration to the end, the digital display of the Karl Fischer test solution consumed by 10mg of water The amount of ml can be calculated as the equivalent amount of water per milliliter of Karl Fischer's test solution (average for 3 titrations)

F=W/A

F - the amount of Karl Fischer test solution per ml corresponds to the amount of water in mg W - the amount of water weighed in A - the amount of Karl Fischer test solution consumed in the titration A. sample test: the liquid to be accurately weighed, Solids and powders are added to the cuvette through the feed hole. Press the “Titration” button to start the titration (average for 3 titrations). The result is calculated as follows:

Moisture%=A*F/W*100%

A - The amount of Karl Fischer test solution consumed in the sample F - The amount of water per milliliter of Karl Fischer test solution is equivalent to the amount of water in the W - W - The sample is weighed in mg. 6. Excluding waste: Press too much if the waste is too much. Drain button to exclude liquid 7. After the test is completed, clean the pipe and cuvette with anhydrous methanol.