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Methodology: Gas Chromatography (GC) / Nitrogen Phosphorus Detection (NPD)
Edit Date: 4/6/2010
Performed: Daily
Released: 24-48 hours after setup at PeaceHealth Laboratories’ reference lab
CPT Code: 82542-90
Specimen Collection Details
Collection: One 5 mL red top tube. Do not use serum separator tube (SST). Also acceptable: Plasma, any type.
Handling: Allow to clot, centrifuge and separate serum or plasma into a plastic vial. Freeze immediately.
Standard Volume: 3 mL serum or plasma.
Minimum Volume: 0.6 mL serum or plasma (does not allow for repeat testing or confirmation).
Transport: Frozen on dry ice.
Comments: Peak levels occur at 1-3 hours post dose; trough levels often not detectable.
Rejection Criteria: Use of SST.

PeaceHealth Laboratories