192

Patient Preparation: None required.

CollectL: 24-hour urine. Urine must be refrigerated during collection - 4 ml urine.

Also acceptable: Preserved urine if the pH of the specimen is adjusted to 2-4 with 6M HCl or 50 percent acetic acid OR Unpreserved urine if frozen immediately after collection.

Specimen Preparation: Add 1 g boric acid per 100 mL urine. Record total volume and collection time interval on transport tube and test request form.

Storage/Transport Temperature: Frozen.

Also acceptable: Refrigerated, if preserved with HCl or acetic acid.

Stability: Ambient: 4 hours; Refrigerated: (with preservative): 5 days; Frozen: 1 month

Note:   * This test is approved for all states. *