The amperometric titration method is used to measure...

The amperometric titration method is specifically designed to measure chlorine residual in water samples. This method works by applying a potential to an electrode and measuring the resulting current that flows as the titrant is added. In the context of chlorine measurement, the method can effectively identify the endpoint, which correlates to the concentration of chlorine present in the sample.

Amperometric titrations are particularly effective because they provide real-time measurements, allowing for precise determination of chlorine levels, which are crucial for monitoring water quality and ensuring safe drinking water. Continuous measurement through this technique offers advantages in terms of accuracy and responsiveness compared to other methods.

Other options like pH, total hardness, and alkalinity involve different analytical techniques. For example, pH is typically measured potentiometrically or with colorimetric methods, total hardness is measured using titrimetric methods involving chelating agents, and alkalinity is generally determined through acid-base titration. Each of these methods serves its specific purpose and is not interchangeable with the amperometric titration method used for chlorine residual measurement.