17
Cleaning and Reconditioning BNC (Glass Sensor) Electrodes
Check with the electrode product insert provided with your pH electrode for
full details on maintaining glass sensor pH electrodes
.
Cleaning with Detergent
Vigorously stir the BNC probe in a solution of warm water and detergent (a
few drops of dish detergent in a cup of warm water) for 5 minutes. Rinse well
with deionized water.
Reconditioning with Warm Buffer
Many glass sensor problems are related to the reference junction. If using a
BNC pH electrode with a gel filled reference, the reference can be
reconditioned by soaking in 60
o
C (140
o
F) pH 4.00 buffer with added KCl for
ten minutes. Place the probe in room temperature electrode soak solution (pH
4.00 buffer with added KCl) and allow it to soak for 30 minutes.
Cleaning with Acid
Soak the BNC probe for 30 minutes in 0.1 molar HCl (about a 100:1 dilution
of distilled water to 37% hydrochloric acid). Rinse well, then soak in pH 4.00
buffer for 30 minutes.
CAUTION:
When mixing acid, wear protective
clothing and eyewear. Always add acid to water--
NOT water to acid.
Cleaning with Methanol or Acetone (Grease and Oil Removal)
Rinse the BNC probe in methanol or acetone for 5 minutes. Rinse well with
deionized water. Soak the probe for at least two hours in pH 4.00 buffer.
Содержание IQ150
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