Collect specimen for 24 hrs, or, specified time period; note length of time on request.
How to collect a 24 hr urine sample
24 hr urine collection with 10g Boric Acid preservative
24 hr urine collection with HCl preservative (acceptable, but not preferred)
24 hr urine collection container, no additive (acceptable, but not preferred)
Refrigerated (preferred) - 6 days
Ambient - 2 days
Frozen - 6 months
Kinetic - Jaffe (Alkaline Picrate)