The pH plays a highly important role in biochemistry, chemistry, and engineering, since it exerts an effect in numerous chemical processes. The results of a great many analytical methods are influenced
by the pH of the solvent or buffer.
The measurement can be made with a pH-meter or with rapid tests, such as pH-indicator paper or strips and pH-indicator solutions (pH-indicator mixtures).
The great advantage of the rapid tests is above all that this method of determination can be used directly on the spot without requiring any auxiliaries or sample pre-treatment.
The high accuracy of the results enables the user to take any necessary countermeasures immediately.