S-300 Karl Fischer Moisture Analyzer Procedure
one. S-300 Karl Fischer Moisture Analyzer Installation:
The four small bottles are dry bottles, which are connected to the reagent bottles, solvent bottles, waste bottles, and reaction cups by pipes.
The three large bottles are: brown for the reagent bottle, two white for the solvent bottle, and one for the waste bottle.
The specific connection diagram is as follows:
1. The reaction cup is connected to the pipeline of the solvent bottle. The side of the solvent bottle is inserted into the bottom. The reaction cup only needs to enter 1 cm, and it does not need to be inserted into the end.
2. The solvent bottle is connected to the drying bottle line. The solvent bottle can be inserted into the bottle for a few centimeters. The dry bottle can also be inserted into the lid.
3. Connect the reaction cup to the pipeline of the waste liquid bottle. Insert a few centimeters into the waste liquid bottle and insert the reaction cup into the bottom.
4. The waste bottle is connected to the drying bottle line, the waste bottle can be inserted into the bottle for a few centimeters, and the dry bottle can be inserted into the lid.
5. The waste bottle drying bottle is connected to the pipeline of the air pump, and the waste liquid bottle is inserted into the bottom, and the cotton is below.
6. If you encounter a situation when you insert the pipeline, try another hole. If it is not enough, you can use a screwdriver to drill the hole and slightly enlarge the hole. If it leaks, you can add some seals. ring.
7. The electrode is inserted 3 cm from the bottom of the reaction cup.
8. Check if the two platinum wires of the electrode are separate. If they are not entangled, gently separate them so that the two platinum wires are parallel.
9. The distance between the titration head and the bottom of the reaction cup is about 2 cm.
two. Steps
1. Manual control - solvent absorption - After the end of the platinum plate, press to return to stop.
2. Calibration - blank
3. Calibration - Reagent calibration - use 10ul of syringe, take 10ul of pure water or deionized water, wipe off the residual water on the needle of the syringe, enter the reaction cup, insert the needle below the liquid level, input 10mg, Press the enter key.
4. If the system detects that it is not in the end state, it will prompt blank. Press the Enter key to start blanking. After the blank is completed, press the Back key to return to the calibration operation interface.
5. Calibration 3-5 times
6. Measure, select the measurement, press OK to enter the measurement interface, use the dispensed disposable syringe for the liquid sample, take a certain amount of sample, weigh it on the balance, then enter the reaction cup, then weigh once, input the sample weight, Press the start key to take the measurement.
7. Aldehyde and ketone sample test, the customer has a sample of ketone, which needs to be measured with aldehyde and ketone reagents, including Karl Fischer reagent for aldehydes and ketones, special solvent for aldehydes and ketones, aldehydes and ketones and general reagents. The end point is different. When measuring the ketone sample, you need to change the end current. The specific method is as follows: equipment maintenance - equipment parameters - fast titration current - change to 26 slow titration current is changed to 32 end current is changed to 34, then return can be .
After replacing the aldehyde and ketone reagents, the reaction cup should be cleaned with a special solvent for aldehydes and ketones. The sample of aldehydes and ketones should react with methanol to form water.
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