Electrode (such aspH electrodeIonic electrodes are the core components in the field of detection, and their sensitive membranes (such as glass membranes and single crystal membranes) have fine structures and are sensitive to chemical corrosion. Long term use of strong acids (such as concentrated hydrochloric acid) or strong bases (such as sodium hydroxide) for cleaning can quickly remove dirt, but it can cause multiple hazards:

1. Corrosion of sensitive filmStrong acid-base damage to membrane chemical bonds (such as replacement of Na ⁺ by H ⁺ in glass film, erosion of Si-O-Si network by alkali) leads to a decrease in response sensitivity (such as a decrease in pH electrode slope) and an increase in measurement error; The membrane of ion selective electrodes (such as fluoride electrodes) dissolves and the selectivity deteriorates.

2. Reference system damagedAcid and alkali infiltration into the reference chamber pollutes the electrolyte, corrodes the reference film (such as silver silver chloride), causing potential drift and blockage of the liquid interface.

3. Damage to the main materialThe glass shell becomes brittle and cracked due to alkali corrosion, the plastic shell swells, the metal lead oxidizes, and the electrode life is shortened.

4. performance degradationSurface roughness adsorbs secondary pollutants, resulting in slower response speed and reduced reproducibility.

5. potential safety hazardStrong acid-base volatilization and corrosion of operators, frequent replacement of electrodes increases costs.

Scientific adviceChoose a mild method based on the pollutant - use dilute acid (0.1mol/L HCl) or ultrasound for inorganic salts; Neutral detergent for oils and fats+ethanol; Protein enzyme solution; Metal ions are treated with EDTA. Post cleaning service buseRinse with deionized water, calibrate regularly, and store properly when not in use for a long time. Avoid relying on strong acids and bases, prolong electrode life, and ensure accurate measurement.