Which statement about the measurement of ammonia concentration is correct?

The statement regarding the importance of proper collection procedures to avoid false results in the measurement of ammonia concentration is accurate. Ammonia is a volatile compound that can easily be affected by contamination, improper handling, and environmental factors. When collecting samples for ammonia testing, it is crucial to follow standardized protocols to minimize the risk of sample degradation or contamination.

For instance, blood samples should be collected into appropriate containers and processed quickly, as ammonia can increase rapidly in unprocessed samples due to cellular metabolism, which can produce ammonia after blood collection. Moreover, samples often require refrigeration to stabilize ammonia levels. This highlights the necessity of meticulous handling to ensure that the results reflect the true concentration of ammonia in the sample at the time of collection.