What is the standard urine sample volume used to determine alcohol concentration in a urine test?

• A. 67 milliliters
• B. 1 liter
• C. 100 milliliters
• D. 210 liters

Answer: (A)

The idea here is understanding why a specific urine volume is used for measuring alcohol concentration. The standard amount chosen is 67 milliliters because it provides enough material for accurate analysis with common lab methods (such as enzymatic assays or chromatographic techniques) while still being practical to collect, store, and potentially re-test if needed. Having this fixed volume helps ensure the result is representative and reduces errors from too-small samples, sample handling losses, or the need to repeatedly draw urine. The other options are either far too large to be practical or do not align with typical laboratory protocols used for urine alcohol testing.