Final answer:
A urine specimen collected over a specific period of time for quantitative analysis is called a 24-hour urine collection.
Step-by-step explanation:
A urine specimen collected over a specific period of time for quantitative analysis is called a 24-hour urine collection. This involves collecting all urine voided over a 24-hour period and measuring various constituents of urine, such as volume, electrolytes, and metabolites.