Acidity meter is a kind of commonly used instrument and equipment. It is mainly used to accurately measure the pH value of liquid medium. The corresponding ion selection electrode can also measure the MV value of ion electrode. The acidity meter uses the MCU to control the measurement process and utilizes digital filtering and other technologies to improve system reliability. It is easier to use and has better stability. Widely used in industry, agriculture, scientific research, environmental protection and other fields.
At present, the electrodes used in the laboratory are all composite electrodes. The advantages are that they are easy to use, free from oxidizing or reducing substances, and have a faster balance. In use, the rubber sleeve and the rubber sleeve at the bottom of the electrode filling port are completely removed to maintain the hydraulic pressure difference of the potassium chloride solution in the electrode. The following is a brief introduction to the use and maintenance of the electrode.
The correct use and maintenance of the pH meter:
1. When the composite electrode is not used, it can be fully immersed in 3M potassium chloride solution. Never wash with wash solution or other absorbent agents.
2. Before use, check the bulb at the front of the glass electrode. Under normal conditions, the electrode should be transparent and free from cracks; the bulb should be filled with a solution and no bubbles should be present.
3. When measuring a solution with a large concentration, try to shorten the measurement time as much as possible and carefully clean it after use to prevent the measured liquid from adhering to the electrode and contaminating the electrode.
4. After cleaning the electrode, do not wipe the glass film with filter paper, but use filter paper to dry it to avoid damage to the glass film and prevent cross-contamination, affecting the measurement accuracy.
5. The silver-silver chloride internal reference electrode of the measurement electrode should be immersed in the chloride buffer solution in the bulb to avoid the phenomenon of digital chatter in the display part of the electricity meter. When using, pay attention to gently swing the electrode.
6. The electrode cannot be used for strong acids, alkalis or other corrosive solutions.
7. It is strictly prohibited to use in dehydrating medium such as absolute ethanol, potassium dichromate, etc.
At present, the electrodes used in the laboratory are all composite electrodes. The advantages are that they are easy to use, free from oxidizing or reducing substances, and have a faster balance. In use, the rubber sleeve and the rubber sleeve at the bottom of the electrode filling port are completely removed to maintain the hydraulic pressure difference of the potassium chloride solution in the electrode. The following is a brief introduction to the use and maintenance of the electrode.
The correct use and maintenance of the pH meter:
1. When the composite electrode is not used, it can be fully immersed in 3M potassium chloride solution. Never wash with wash solution or other absorbent agents.
2. Before use, check the bulb at the front of the glass electrode. Under normal conditions, the electrode should be transparent and free from cracks; the bulb should be filled with a solution and no bubbles should be present.
3. When measuring a solution with a large concentration, try to shorten the measurement time as much as possible and carefully clean it after use to prevent the measured liquid from adhering to the electrode and contaminating the electrode.
4. After cleaning the electrode, do not wipe the glass film with filter paper, but use filter paper to dry it to avoid damage to the glass film and prevent cross-contamination, affecting the measurement accuracy.
5. The silver-silver chloride internal reference electrode of the measurement electrode should be immersed in the chloride buffer solution in the bulb to avoid the phenomenon of digital chatter in the display part of the electricity meter. When using, pay attention to gently swing the electrode.
6. The electrode cannot be used for strong acids, alkalis or other corrosive solutions.
7. It is strictly prohibited to use in dehydrating medium such as absolute ethanol, potassium dichromate, etc.
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