Introductory · 6 min
Measuring pH: electrode selection and calibration
A pH value needs known measurement conditions. Prepare a repeatable protocol before selecting equipment.
Define the medium
Record temperature, solvent and expected composition. An electrode intended for water is not automatically suitable for solvents or suspensions.
Calibrate before the series
Follow the manual and choose buffers surrounding the expected range. Record buffer batch, date and temperature. Rinse between solutions and wait for stability.
Keep a record
Record pH, temperature, electrode reference and protocol. Use the storage solution prescribed by the manufacturer.
Practical example
Template: sample / temperature (°C) / pH / buffers / stability / observations. Run a control measurement after the series.
References
Hanna — Manuel HI98107 (exemple de protocole propre à un appareil)
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