Conductometric titration is a quantitative analysis technique that detects the concentration of an analyte by measuring the change in electrical conductivity of a reaction mixture as a reactant is added. The conductivity depends on the number and charge of ions in solution. During titration, one ion is replaced with another, changing the conductivity. Conductometric titrations can determine water purity, pollution levels, salinity, alkalinity, and purity of deionized water. They are commonly used in the food and pharmaceutical industries.