Water quality - Radon-222 - Part 3: Test method using emanometry (ISO 13164-3:2013)

This document outlines a specific procedure for the determination of radon-222 emanation in water samples, serving as the third part of a comprehensive series on water quality analysis involving this radionuclide. The methodology focuses on measuring the rate at which radon is released from water into the headspace of a sealed container, providing a standardized approach for environmental monitoring and laboratory testing. It aligns with international technical recommendations to ensure consistency and comparability of results across different facilities and regions. The approach involves preparing water samples, sealing them in appropriate vessels, and allowing the system to reach equilibrium before measuring the gas activity. This process supports regulatory compliance and environmental assessments by establishing a reliable framework for detecting radon concentrations derived from emanation processes. The text details the necessary equipment, reagents, and calculation methods required to perform the test accurately. It emphasizes the importance of controlling environmental variables and sample handling to minimize uncertainty in the final measurement results. This document is intended for use by analytical laboratories and professionals involved in water quality surveillance.