How to Operate an Automatic Potential Titrator
The automatic potential titrator has multiple measurement modes such as dynamic titration, equal volume titration, end point titration, PH measurement, etc. The titration results can be output in the format required by GLP/GMP, and the stored titration results can be statistically analyzed.
First, take out the ph electrode from the saturated kcl aqueous solution, wash it with distilled water and wipe it clean, then insert the pipette into the distilled water, and insert the burette into the waste liquid bottle. Click "parameters" on the working program interface to set the parameters, and arrange the settings according to your need for the titration situation. Turn on the power of the host and the agitator of the automatic potential titrator, and start the working program, then click the "send" button on the operation page, input the volume and press "send" to fill the pipe with liquid. Check if there are bubbles, if there is, insert the bubble needle into the loop to suck out the gas. Then insert the pipette into the standard solution, insert the burette into the test solution, at the same time, place the test solution on the agitator and put down the stir bar, insert the washed pH electrode into the test solution, and make the electrode tip Immerse in the liquid.
At this time, the instrument draws a curve on the screen while titrating. After the titration, the instrument automatically calculates the endpoint volume, the endpoint potential and the concentration of the liquid to be measured. After the measurement is over, take out the electrode, clean it and put it back in the kcl saturated liquid for later use, turn off the titrator and the computer power. The operation comes to an end.
When using an automatic potential titrator, it is quite necessary to ensure the reliability of the buffer solution. Do not mix the buffer solution incorrectly, otherwise the measurement will be inaccurate. After removing the electrode cover, avoid the sensitive glass bulb of the electrode from contacting hard objects, because any damage or grazing will cause the electrode to fail. For the external reference of the composite electrode, it should always be noted that saturated potassium chloride solution and replenisher can be added from the small hole at the top of the electrode. The electrode should be avoided long-term immersion in distilled water, protein solution and acidic fluoride solution, and the electrode should avoid contact with silicone oil.