Random urine.

10 mL urine ambient - pH adjusted to less than 3.0 using 6N HCI (Min: 0.5 mL).

* Collection Instructions *

Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen.

Patient Preparation:

• It is preferable for the patient to be off medications for three days prior to collection. However, common antihypertensive (diuretics, ace inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference.
• Patient should avoid alcohol, coffee, tea, tobacco (including use of nicotine patch), banana, citrus bruits and strenuous exercise prior to collection.

Ambient: 10 days

Refrigerated: 14 days

Frozen: 1 year

• pH greater than 3.0
• Received frozen