The newly added Karl Fischer reagent in the electrolytic cell of Jingtai Micro Moisture Analyzer is in the state of iodine, which is brownish black or brownish red. You need to inject appropriate amount of water into the reagent to react the excess iodine.
The specific steps of reagent adjustment for rapid moisture analyzer are as follows:
Step 1: Connect the power socket on the rear panel of the host to the 220V AC power supply through the power cord, and turn on the power switch, and then turn on the stirring and electrolysis switches in sequence (the stirring must be turned on when starting up, and then the electrolysis is turned on, otherwise it may cause iodine phenomenon , Affecting the accuracy of the experimental results).
Step 2: Adjust the stirring speed adjustment knob so that the Karl Fischer reagent in the anode chamber forms a small vortex.
Step 3: Use a 50μL micro sampler to draw 20μL of distilled water, and slowly inject it into the electrolytic cell several times through the injection port of the injection cock (the needle needs to be immersed below the level of Karl Fischer reagent), while observing the Karl in the anode chamber The color of the Fischer reagent changes (the color becomes lighter with the injection of distilled water). For example, after the distilled water is injected into the micro sampler, the color of the Karl Fischer reagent has not changed to light yellow, and the above operation can be repeated. When the color of the Karl Fischer reagent in the anode chamber changes to light yellow, stop pouring distilled water when the display starts counting.
At this time, the adjustment of the Karl Fischer reagent balance operation is completed (Note: When the Karl Fischer reagent reaches equilibrium, the color of the Karl Fischer reagent in the electrolytic electrode is still dark, and the iodine in it will penetrate into the anode chamber through the ceramic plate semi-permeable membrane. It may cause iodine phenomenon and affect the accuracy of the measurement data. You can use a 0.5μL micro sampler to inject a little distilled water before the injection to react the excess iodine and inject the sample immediately after the end point is reached. Error. After 2 ~ 6 hours, the color of Karl Fischer reagent in the electrolytic electrode will automatically change to light yellow.)
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