Measurement Techniques
•Always use fresh ORP standard for calibration.
•If the electrode is refillable, remove the filling hole cover during measurements to ensure a uniform flow of filling solution.
•Between measurements, thoroughly rinse the electrode with distilled water. Gently shake the electrode after rinsing to prevent solution carryover and then blot the electrode dry with a
•Stir all standards and samples at a uniform rate.
•Place a piece of insulating material, such as Styrofoam or cardboard, between the magnetic stirrer and beaker to prevent measurement errors from the transfer of heat to the sample.
•Allow all standards and samples to come to room temperature for precise measurements.
•If the electrode is used in dirty or viscous samples or the electrode response becomes sluggish, empty the electrode completely and hold the junction under running water. Empty any water from the electrode and refill it with fresh electrode filling solution.
•If a
•Make sure the electrode filling solution is appropriate for the sample. Use Cat. No. 900011 filling solution for samples that have a total ionic strength greater than 0.2 M. Use Cat. No. 900001 filling solution for samples that have a total ionic strength less than 0.2 M.
Redox/ORP Electrode User Guide |
