Highly viscous, protein rich samples: such matrices are guaranteed to be high on the list of pH measurement nightmares. The electrode has to be chosen with respect to the:
- diaphragm - which should be as dirt-resistant as possible;
- electrolyte solution - which shouldn't denature the protein (3 mol/L KCL denatures quite well);
- viscosity of the sample: highly viscous samples (cream, yoghurt, butter) - use a "spearhead" electrode. Diary drinks with medium viscosity : use a robust diaphragm (ground joint)!
Emulsions, suspensions and viscous solutions
Lab measurements
Measuring pH in viscous solutions, emulsions or suspensions in the laboratory is straightforward with the Metrohm 827 pH lab and the Metrosensor spearhead electrode with polymer electrolyte.
Plant measurements
For plant measurements of pH in emulsions, viscous solutions and suspensions it's best to have a portable Metrohm 826 pH mobile and the optimum sensor: the Metrosensor spearhead electrode!
Solutions with low viscosity
Lab measurements
Your perfect system for measuring pH in dairy product samples with low viscosity in the laboratory is the Metrohm 827 pH lab plus the Metrosensor Unitrode filled with Idrolyte.
Plant measurements
When measuring pH in dairy products with low viscosity at the plant you're on the right track with a portable Metrohm 826 pH mobile and an optimised Metrosensor electrode: the Unitrode!
