Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed:
Sun-Sat
Reported:
1-4 days
Specimen Required:
Collect: Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2EDTA).
Specimen Preparation: Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature: Refrigerated.
Unacceptable Conditions: Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).
Stability (collection to initiation of testing): After separation from cells: Ambient: 6 weeks; Refrigerated: 6 weeks; Frozen: 2 months
Reference Interval:
Dose-Related Range: 10-75 ng/mL - based on dosages up to 6 mg/d Toxic: >100 ng/mL
