What is the typical storage condition for urine specimens after collection for short-term storage?

• A. Room temperature
• B. Dry storage
• C. Refrigeration at 2-8°C for short-term storage, or freezing for long-term storage.
• D. Warm storage

Answer: (C)

Preserving urine sample integrity requires temperature control to slow changes that can affect drug stability and the levels of analytes. For short-term storage, refrigeration at 2–8°C keeps the specimen cold enough to limit degradation and microbial growth without freezing it, which helps maintain accurate results. Freezing is used for long-term storage to stop nearly all activity, but for short-term needs, room temperature or warm storage accelerates degradation and bacterial metabolism, making results unreliable. Dry storage isn’t appropriate for urine because it can alter concentration or cause other changes in the liquid sample. So refrigeration for short-term storage, or freezing if storage is needed long-term, is the correct approach.