Tech Note 1160 Detail

Are there alternative calibration solutions for use with the ORP (oxidation-reduction potential) probe?

Affected Products:

CI-6716 Oxidation Reduction Potential Probe

Problem/Symptom:
Are there alternative calibration solutions for use with the ORP (oxidation-reduction potential) probe?

PASCO Solution:

Some additional calibration solutions that can be used for the ORP probe are included below.

Redox Standard #1: 0.1 M Ferrous Ammonium Sulfate - 39.21 g/liter

0.1 M Ferric Ammonium Sulfate - 48.22 g/liter

1.0 M Sulfuric Acid - 56.2 ml/liter

pH = 0, redox reading vs Ag/AgCl ref = +478



Redox Standard #2: 0.01 M Ferrous Ammonium Sulfate - 3.92 g/liter

0.1 M Ferric Ammonium Sulfate - 48.22 g/liter

1.0 M Sulfuric Acid - 56.2 ml/liter

pH = 0, redox reading vs Ag/AgCl ref = +532



Redox Standard #3: 0.1 M Ferrous Ammonium Sulfate - 39.21 g/liter

0.1 M Ferric Ammonium Sulfate - 48.22 g/liter

redox reading vs Ag/AgCl ref = +440



Redox Standard #4: 0.1 M Ferrous Ammonium Sulfate - 39.2 g/liter

0.01 M Ferric Ammonium Sulfate - 4.82 g/liter

redox reading vs Ag/AgCl ref = +382

Creation Date: 10/18/2011
Last Modified: 10/18/2011
Mod Summary: