Isotope dilution analysis:

Isotope dilution analysis (IDA) is primarily a destructive analytical method where it is essential to dissolve the sample and hence its identity is lost. Sensitivity of IDA is often restricted by the specific activity of the radiotracer. Since availability of a suitable radiotracer is very essential, it is not universally applicable. Instrumentation required for IDA work is much simpler and less costly than that required for NAA work. Availability of nuclear reactor puts another limitation for NAA whereas radiotracer based IDA can be carried out at any place far away from the reactor location.