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Methodology: Porter-Silber
Edit Date: 8/13/2010
Performed: Tuesday, Friday
Released: 3-7 days after setup at PeaceHealth Laboratories reference lab
Specimen Collection Details
Collection: 24-hour urine. Refrigerate during collection, handling, and transport.
Handling: Mix well, add 1g boric acid/100 mL urine, adjust pH with boric acid to 5.0-7.0 and freeze. Record total volume, collection time, and pH on requisition.
Stability: With preservative, 4 hours ambient or 7 days refrigerated. Unpreserved, 30 days frozen.
Standard Volume: 12 mL urine
Transport: Frozen.
Comments: Random specimens are acceptable, but are reported as mg/L and have no reference interval. Specimens refrigerated without preservatives are acceptable.
Rejection Criteria: Alkali preservatives, e.g., specimen previously preserved with NaOH.

PeaceHealth Laboratories