If your urine sample has been refrigerated, how long should you wait to test it?

Testing a refrigerated urine sample typically requires allowing it to come to room temperature before analysis. The recommended waiting time of 20 to 30 minutes is crucial for this process as it helps ensure that the physical and chemical properties of the urine are consistent with those expected during a fresh test. If the sample remains cold, some components may not be accurately measured, potentially leading to invalid results.

This waiting period allows any temperature-dependent reactions to occur and ensures that the urine is uniform for testing, reflecting its true characteristics. Thus, option B provides the appropriate time frame necessary for this adjustment, enabling technicians to perform reliable analyses.