Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Rejection Criteria
Samples collected in serum separator tube
Reference Range(s)
Suggested range: 5.0-10.0 MCG/ML
Specimen Requirements
Preferred Specimen
Plain Red Top Tube
Minimum Volume
0.2 mL Serum or Plasma
Sample Stability
7 days room temperature 7 days refrigerated 7 days frozen
Transport Temperature
Refrigerated
Collection Instructions
1 mL serum from a plain red top tube. Allow sample to clot in an upright position for at least 60 minutes, then centrifuge sample and transfer serum to a plastic transport tube within 2 hours of collection. Clearly label tube as serum from a plain red top tube. Refrigerate.
Alternative Specimen
1 mL EDTA Lavender Top Plasma. Centrifuge sample and separate plasma from cells immediately. Transfer plasma to a plastic transport tube. Clearly label tube as EDTA plasma. Refrigerate.