Final answer:
After a 24-hour urine specimen is collected, it should be analyzed promptly or stored at 2-8°C. It is tested for various substances for medical diagnosis and monitoring, and proper storage is crucial to prevent changes in urine composition.
Step-by-step explanation:
After a 24-hour urine specimen has been obtained, it is crucial to analyze it promptly or store it properly to maintain its integrity until analysis. In a clinical setting, the urine should be kept refrigerated or on ice during the collection period to prevent bacterial growth and chemical changes. Once collected, the urine may be sent to a laboratory where it can be tested for various substances, including magnesium, sodium, uric acid, calcium, citrate, oxalate, and phosphate. These tests are essential in diagnosing and monitoring various medical conditions. If there is any delay in the analysis, the urine should be stored at a temperature of 2-8°C to minimize any changes in its composition.
It's important to note that unlike urine samples, blood samples undergo a different preparation process such as being centrifuged and quenched, which are steps not applicable to urine. In tests like the Mosenthal test, the urine is analyzed immediately at specific intervals to check the renal concentrating ability. Therefore, for ordinary urine collection, ensuring correct storage or timely analysis is key to accurate results.
Keep in mind that there should be no blood found in the urine and if contamination happens, for example from menstruation, this should be noted as it may affect the test results.