Specimen Requirements

Plasma or serum and urine are required for this test. Blood specimen should be drawn during the 24-hour period of urine collection or no more than 48 hours after the urine collection.

Plasma

Container/Tube: Mint-top (lithium heparin) tube

Specimen Volume: 0.5 mL of plasma

Collection Instructions:

Note: 1. Indicate plasma.

2. Label specimen appropriately (plasma).

Serum

Container/Tube: Serum gel tube

Specimen Volume: 0.5 mL of serum

Collection Instructions:

Note: 1. Indicate serum.

2. Label specimen appropriately (serum).

Urine

Container/Tube: Plastic urine collection container

Specimen Volume: 10 mL from a 24-hour urine collection

Collection Instructions: No preservative. Refrigerate specimen during collection.

Note: 1. Hydrate patient by administering a minimum of 600 mL of water prior to collection.

2. Tea, coffee, and drugs should be withheld on day of testing.

3. 24-Hour volume is required.

4. Follow instructions in “Urine Collection” in Special Instructions.