Calibration solution pH 6.86 from Orange Tree
Product code for ordering by phone or messengers: ot000110
Description
Calibration solution pH 6.86 from Orange Tree
Calibration solution or buffer solutionEach pH meter needs calibration, which helps the device to establish the relationship between the signal from the electrode and the pH value in the solution.
Calibration is a very important moment! It is necessary to be aware of the impossibility of measuring pH with an accuracy greater than the standards used. For example, if you want to work with an accuracy of 0.01 pH, then the following conditions must be met: the total error of the pH meter and the electrode should not exceed 0.005 pH and calibration should be carried out with special attention on special high-precision buffer solutions.
When calibrated according to such standards, the total error will not exceed 0.04 – 0.03 pH, provided that the error of the device is at a damage of 0.01 pH. This is the most common practice, and you will not find any methodology or GOST that requires maintaining a pH with an accuracy higher than 0.05 pH. The only exceptions are some pharmaceutical and specialized industries.
Recommendations for the calibration process.
Modern pH electrodes are usually combined, i.e. both the pH electrode and the reference electrode are located in the same housing. In addition to ease of operation, it provides a faster response and reduces the total error.
The isoelectric point for such electrodes is at pH = 7 (0 mV). Therefore, first of all, the device should be calibrated by a buffer with a neutral pH (for example, 6.86 or 7.01). The second point should be selected at a distance of about 3 pH units, i.e. pH = 4.01 or 9.18. If the device is calibrated only by two buffers, then the choice of the second point depends on the range in which you mostly you work. If these are alkaline solutions, then use a buffer with pH = 9.18, if acidic – with pH = 4.01. This is due to some difference in the slopes of the calibration lines in the acidic and alkaline regions. There will be no problems if your device can be calibrated at three or more points, since the pH meter tracks it independently.
Instructions and recommendations:
It is recommended to rinse the electrode before and after each use and place it in a KCl solution. Before use, the electrode should be rinsed with clean water, the remaining moisture should be carefully collected with filter paper or a soft cloth. The glass device is very fragile, so it is not recommended to touch the electrode with your fingers.
A calibration solution or buffer solution is a mixture of a weak acid and its salt with a certain, stable indication of hydrogen ions, which practically does not change when they are added or diluted with a small amount of acids.
Store in a dark place, in a tightly closed container at a temperature not exceeding 25 degrees Celsius.
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Description
Each pH meter needs calibration, which helps the device to establish the relationship between the signal from the electrode and the pH value in the solution.
Calibration is a very important moment! It is necessary to be aware of the impossibility of measuring pH with an accuracy greater than the standards used. For example, if you want to work with an accuracy of 0.01 pH, then the following conditions must be met: the total error of the pH meter and the electrode should not exceed 0.005 pH and calibration should be carried out with special attention on special high-precision buffer solutions.
When calibrated according to such standards, the total error will not exceed 0.04 – 0.03 pH, provided that the error of the device is at a damage of 0.01 pH. This is the most common practice, and you will not find any methodology or GOST that requires maintaining a pH with an accuracy higher than 0.05 pH. The only exceptions are some pharmaceutical and specialized industries.
Recommendations for the calibration process.
Modern pH electrodes are usually combined, i.e. both the pH electrode and the reference electrode are located in the same housing. In addition to ease of operation, it provides a faster response and reduces the total error.
The isoelectric point for such electrodes is at pH = 7 (0 mV). Therefore, first of all, the device should be calibrated by a buffer with a neutral pH (for example, 6.86 or 7.01). The second point should be selected at a distance of about 3 pH units, i.e. pH = 4.01 or 9.18. If the device is calibrated only by two buffers, then the choice of the second point depends on the range in which you mostly you work. If these are alkaline solutions, then use a buffer with pH = 9.18, if acidic – with pH = 4.01. This is due to some difference in the slopes of the calibration lines in the acidic and alkaline regions. There will be no problems if your device can be calibrated at three or more points, since the pH meter tracks it independently.
Instructions and recommendations:
It is recommended to rinse the electrode before and after each use and place it in a KCl solution. Before use, the electrode should be rinsed with clean water, the remaining moisture should be carefully collected with filter paper or a soft cloth. The glass device is very fragile, so it is not recommended to touch the electrode with your fingers.
A calibration solution or buffer solution is a mixture of a weak acid and its salt with a certain, stable indication of hydrogen ions, which practically does not change when they are added or diluted with a small amount of acids.
Store in a dark place, in a tightly closed container at a temperature not exceeding 25 degrees Celsius.
Reviews
Calibration solution pH 6.86 from Orange Tree
Calibration solution or buffer solutionEach pH meter needs calibration, which helps the device to establish the relationship between the signal from the electrode and the pH value in the solution.
Calibration is a very important moment! It is necessary to be aware of the impossibility of measuring pH with an accuracy greater than the standards used. For example, if you want to work with an accuracy of 0.01 pH, then the following conditions must be met: the total error of the pH meter and the electrode should not exceed 0.005 pH and calibration should be carried out with special attention on special high-precision buffer solutions.
When calibrated according to such standards, the total error will not exceed 0.04 – 0.03 pH, provided that the error of the device is at a damage of 0.01 pH. This is the most common practice, and you will not find any methodology or GOST that requires maintaining a pH with an accuracy higher than 0.05 pH. The only exceptions are some pharmaceutical and specialized industries.
Recommendations for the calibration process.
Modern pH electrodes are usually combined, i.e. both the pH electrode and the reference electrode are located in the same housing. In addition to ease of operation, it provides a faster response and reduces the total error.
The isoelectric point for such electrodes is at pH = 7 (0 mV). Therefore, first of all, the device should be calibrated by a buffer with a neutral pH (for example, 6.86 or 7.01). The second point should be selected at a distance of about 3 pH units, i.e. pH = 4.01 or 9.18. If the device is calibrated only by two buffers, then the choice of the second point depends on the range in which you mostly you work. If these are alkaline solutions, then use a buffer with pH = 9.18, if acidic – with pH = 4.01. This is due to some difference in the slopes of the calibration lines in the acidic and alkaline regions. There will be no problems if your device can be calibrated at three or more points, since the pH meter tracks it independently.
Instructions and recommendations:
It is recommended to rinse the electrode before and after each use and place it in a KCl solution. Before use, the electrode should be rinsed with clean water, the remaining moisture should be carefully collected with filter paper or a soft cloth. The glass device is very fragile, so it is not recommended to touch the electrode with your fingers.
A calibration solution or buffer solution is a mixture of a weak acid and its salt with a certain, stable indication of hydrogen ions, which practically does not change when they are added or diluted with a small amount of acids.
Store in a dark place, in a tightly closed container at a temperature not exceeding 25 degrees Celsius.
