pH is the measurement of the hydrogen ion activity in a liquid solution. It is one of the most common forms of analytical measurement in the industry because pH has a great effect on the outcome of many chemical processes. Food processing, water treatment, pharmaceutical production, steam generation (thermal power plants), and alcohol manufacturing are just some of the industries making extensive use of pH measurement (and control). pH is also a significant factor in the corrosion of metal pipes and vessels carrying aqueous (water-based) solutions, so pH measurement and control are important in the life-extension of these capital investments.
There are two types of pH measurement:
- Colorimetric pH measurement
- Potentiometric pH measurement
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