Why rinse electrodes

Soak electrode for 20 minutes. NOTE: Never condition the electrode in distilled water or deionised water - long term exposure to pure water will damage the special glass membrane. After conditioning the sensor, rinse the electrode with distilled or deionised water. The electrode is ready for calibration and measurement.

Storing Always keep pH electrode moist. If the pH electrode is liquid-filled, cover the refilling port with the slider to prevent evaporation of filling solution. Wash the protective cap with clean water to wet the sponge and remove KCl salts. Insert the pH electrode into the protective cap with wet sponge. The water will not dissipate easily as the cap fit snugly on the electrode body. This environment is enough to keep the glass membrane and junction moist. It is not necessary to fill the cap with clean water and soak the pH electrode tip.

Short-term storage: Between measurements, the pH electrode can be soaked in pH 7. Site search Search keyword s : Search.

Irvine, California. Water Quality Analyzers Contact Form. All rights reserved. Clean water e. To top up or re-fill the reference chamber of liquid-filled pH electrode, push the slider upward to uncover the refilling port and insert a dropper containing fresh 3.

The filling solution should reach the bottom of the refilling port. The filling solution level must be maintained just below the refilling port and higher than the pH buffer or sample level during calibration and measurement. This creates a positive head pressure forcing the filling solution to leak into pH buffer or sample through the junction and preventing the reverse.

Bubbles may form and get trapped within the solution of the sensing tip or reference chamber during transportation. This can affect the operation of your pH electrode. To dislodge the bubbles, gently shake the electrode body. If the pH sensor calibrates to buffers it can be used in tests. When the pH electrode cannot be calibrated even after attempts to clean it, it must be replaced. For protein removal, soak the pH electrode in contact lens enzymatic cleaner solution overnight.

The enzymes will remove proteins from glass and plastic. Company certificates Trade conditions. Acknowledgement News. Electrode stock should be rotated accordingly. Cleaning Electrodes Mechanically intact electrodes with no broken parts can often be restored to normal performance by one of the following procedures:.

Soak the electrode in storage solution for at least 10 minutes prior to use. If these steps fail to restore normal electrode response, replace the electrode. Reconditioning Electrodes Older electrodes, or electrodes that have been stored dry, may need to be "reconditioned".

Recondition an electrode by soaking it in pH 4. Often electrodes are used in applications that require regular cleaning of the electrode or reference. These applications usually involve very hard waters with high scale content , dirty samples like soil slurries, viscous materials, or samples with high oil and protein content. As with any procedure involving strong chemicals, please wear appropriate safety apparel and goggles, and provide adequate ventilation.

These procedures are not recommended for persons unfamiliar with, or unable to use, safe techniques involving these chemicals: detergents, HCl hydrochloric acid , NaOH sodium hydroxide.