What does the Activated Charcoal Test primarily measure?

The Activated Charcoal Test primarily measures indoor radon levels over a specific time period. This method involves using activated charcoal to absorb radon gas that diffuses into the test device. The charcoal then gets sent to a laboratory for analysis, where the presence and concentration of radon can be determined.

The focus on gamma radiation from Bi-214 and Pb-214 is often associated with other types of measurements or analyses related to radon decay products, but it does not specifically pertain to what the Activated Charcoal Test measures. This test does not focus on measuring gamma radiation itself. Instead, it quantifies the radon gas present in a home or building environment, helping to assess the potential health risks associated with prolonged radon exposure.

The key aspect of this test is its ability to reflect the average radon concentration over the duration it is deployed in a given area, which is crucial for determining long-term exposure risks. Thus, the correct selection related to the primary function of the Activated Charcoal Test is effectively covered by its ability to measure indoor radon levels over time.