Radiometric Titrations (RT):

Radiometric titrations are based on the detection of radioactivity in a separable species used to indicate the endpoint of a titration. It has the unique advantage of repairing no indicator is required. Radiotracer may be added to the titrant or the unknown analyte sample. Sole purpose of the use of radioactivity is for detection of end point and as such it does not participate in the titration process. At the end of reaction, there is sudden change in activity level wherefrom end point may be determined. It is of special importance where suitable indicators are not available in conventional titrimetry (neutralization, redox, precipitation and complexometric titrations). However, it is essential to have a separable phase and that puts great limitation on its use though in principle it can be used for all types of titrations. Therefore, most successful radiometric titration procedures have been developed for the precipitation reactions.