Copper-Copper Sulfate Reference Electrode Maintenance

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Copper-Copper Sulfate Reference Electrode Maintenance


Copper-Copper Sulfate Reference Electrode Maintenance

Portable copper-copper reference electrodes require maintenance to maintain the integrity of readings taken when using the electrode. 

Frequency
Maintenance should be done on a periodic basis depending on how often the electrode is used or the conditions in which it is used.  A good rule of thumb for rejuvenating an electrode is when the copper sulfate liquid inside the electrode becomes “milky” as the color should be a very bright blue.

 

Maintaining or Rejuvenating Portable Copper-Copper Reference Electrodes

  1. Open the reference electrode by unscrewing the plastic end cap where the copper rod is mounted.
  2. Properly dispose of the liquid copper sulfate.

Note:  This liquid is hazardous. Proper safety measures should be employed including the use of safety glasses and disposable gloves.

  1. Clean the internal copper rod with a non-metallic abrasive, such as sandpaper or a scouring pad. This will remove any patina or impurities from the rod.

Note:  NEVER use metallic abrasives to clean the rod, such as an emery cloth, as it will contaminate the copper rod.

  1. Add new, pure copper sulfate crystals to the interior of the reference electrode by removing the end cap of the electrode. Fill the electrode cavity to approximately one-third to half full.
  2. Add clean, distilled water to the interior of the electrode filling the electrode to almost full.

Note:  NEVER use tap water for this purpose.

  1. Replace the plastic end cap by threading it back onto the electrode body.
  2. Ensure the ceramic tip of the electrode is clean and in good condition. A cracked ceramic tip should be replaced with a new tip to avoid excessive electrolyte leakage.



 

 

 

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