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pH Electrode Care and Maintenance
Since pH electrode is susceptible to dirt and contamination, clean as necessary depending on the extent and condition of use.
AFTER MEASURING:
Rinse the pH electrode in distilled water, store the electrode into the electrode storage solution.
CLEANING THE ELECTRODE:
●
Salt deposits: Soak the electrode in warm tap water to dissolve deposits, then thoroughly rinse with distilled water.
●
Oil or Grease film: Wash the electrode bulb gently in some detergents and water. If necessary, using the alcohol to clean the electrode bulb, then
rinse with distilled water. Place the sensor in the electrode storage solution for 30 minutes.
●
Clogged reference junction: Heat a diluted KCl solution to 60
o
C to 80
o
C. Place the sensing part of the electrode into the heated solution for about 10
minutes. Allow the electrode to cool in some unheated KCl solution.
●
Protein deposits: Prepare a 1% pepsin solution in 0.1M of HCL. Place the electrode in the solution for 10 minutes. Rinse the sensor with distilled
water.
REACTIVATING THE ELECTRODE:
If stored and cleaned properly, the electrode should be ready for immediate use. However, a dehydrated bulb may cause sluggish response. To rehydrate the
bulb, immerse the electrode in a pH4.01 buffer solution for 10 to 30 minutes. If this fails, the electrode requires activation.
●
Soak the pH electrode in 0.1M HCl for 5 minutes.
●
Remove and rinse with deionized water, then place in 0.1M NaOH for 5 minutes.
●
Remove and rinse again, and soak in electrode storage solution for 30 minutes.
ORP Electrode Care and Maintenance
●
Ensure that the ORP electrode is thoroughly washed with distilled water after each use.
●
In aggressive chemicals, dirty or viscous solutions, and solutions with heavy metals or proteins, take readings quickly and rinse electrode immediately
after.
●
If you do not use the electrode for long periods, please store the electrode with electrode storage solution.
CLEANING THE ELECTRODE:
Contamination of the sensing element often results in slow response and inaccurate readings. If necessary, clean the element by one of the following
procedures.
Inorganic Deposits:
●
Soak the ORP electrode in 0.1M HCl for 10 minutes.
●
Remove and rinse with distilled water, then place in alcohol for 5 minutes.
●
Remove and rinse again, and soak in pH4.01 buffer solution for 15 minutes.
Oil and Grease Films:
●
Wash the electrode gently in some detergents and water.
●
Dip the electrode in the electrode storage solution for at least 30 minutes.
Ion Selective Electrode Care and Maintenance
●
Ensure that the electrode is thoroughly washed with distilled water after each use.
●
DO NOT scratch the sensitive membrane on electrode during the measurement or calibration.
●
If you do not use the electrode for long periods, please store the electrode in a dry, cool and well-ventilated area.
EC910 Portable Multiparameter Water Quality Meter
