The PH meter is correctly used and maintained . The acidity meter is referred to as the pH meter and consists of two parts: an electrode and an electric meter. If the electrode can be properly maintained during use, the standard buffer is prepared as required, and the meter is operated correctly, the pH indication error can be greatly reduced, thereby improving the reliability of chemical experiments and medical test data.
First, the correct use and maintenance of the electrode The electrode used in the laboratory is a composite electrode, its advantages are easy to use, not affected by oxidative or reducing substances, and the balance speed is faster. When in use, the rubber sleeve and the rubber sleeve at the lower end of the electrode filling port are completely removed to maintain the hydraulic pressure difference of the solution in the electrode. The following is a brief introduction to the use and maintenance of the electrode:
1. When the composite electrode is not used, it can be fully immersed in the 3M solution. Do not dip with washing liquid or other water-absorbing reagents.
2. Check the bulb at the front end of the glass electrode before use. Under normal circumstances, the electrode should be transparent without cracks; the bulb should be filled with solution and no bubbles should exist.
3. When measuring a solution with a large concentration, shorten the measurement time as much as possible, and carefully clean it after use to prevent the test solution from adhering to the electrode and contaminating the electrode.
4. After cleaning the electrode, do not wipe the glass film with filter paper, and use filter paper to dry, avoid damage to the glass film, prevent cross-contamination, and affect measurement accuracy.
5. In the measurement, pay attention to the silver-silver chloride internal reference electrode of the electrode should be immersed in the chloride buffer solution in the bulb to avoid digital jumping phenomenon in the display part of the electricity meter. When using, be careful to gently rub the electrode a few times.
6. The electrode should not be used in strong acids, strong bases or other corrosive solutions.
7. It is strictly forbidden to use in dehydrating media such as absolute ethanol, potassium dichromate and the like.
First, the correct use and maintenance of the electrode The electrode used in the laboratory is a composite electrode, its advantages are easy to use, not affected by oxidative or reducing substances, and the balance speed is faster. When in use, the rubber sleeve and the rubber sleeve at the lower end of the electrode filling port are completely removed to maintain the hydraulic pressure difference of the solution in the electrode. The following is a brief introduction to the use and maintenance of the electrode:
1. When the composite electrode is not used, it can be fully immersed in the 3M solution. Do not dip with washing liquid or other water-absorbing reagents.
2. Check the bulb at the front end of the glass electrode before use. Under normal circumstances, the electrode should be transparent without cracks; the bulb should be filled with solution and no bubbles should exist.
3. When measuring a solution with a large concentration, shorten the measurement time as much as possible, and carefully clean it after use to prevent the test solution from adhering to the electrode and contaminating the electrode.
4. After cleaning the electrode, do not wipe the glass film with filter paper, and use filter paper to dry, avoid damage to the glass film, prevent cross-contamination, and affect measurement accuracy.
5. In the measurement, pay attention to the silver-silver chloride internal reference electrode of the electrode should be immersed in the chloride buffer solution in the bulb to avoid digital jumping phenomenon in the display part of the electricity meter. When using, be careful to gently rub the electrode a few times.
6. The electrode should not be used in strong acids, strong bases or other corrosive solutions.
7. It is strictly forbidden to use in dehydrating media such as absolute ethanol, potassium dichromate and the like.
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