24 hour random urine collection.

10 mL aliquot from a 24-hour urine that has been preserved with 25 mL 6N HCI, collected in a plastic 24-hour urine container (Min: 5 mL urine from a 24-hour urine container).

* Collection Instructions *

• Collect 24-hour urine with 25 mL 6N HCI to maintain a pH equal to or less than 3.
• If no preservative is used, specimen must be stored refrigerated during collection but shipped frozen and pH must be equal to or less than 6.
• Record 24-hour urine volume and patient's age on test request form and urine container.

Preserved urine

Ambient: 7 days

Refrigerated: 30 days

Frozen: 30 days

Unpreserved urine

Ambient: Unacceptable

Refrigerated: Unacceptable

Frozen: 30 days

• Preserved urine received refrigerated with a pH greater than 3
• Unpreserved urine received frozen with pH greater than 6