|Values are valid only on day of printing.|
If screen is positive, specimens are automatically confirmed by GC/MS and/or LC/MS/MS at an additional charge.
Submit only one of the following:
Draw blood in a gray top potassium oxalate/sodium fluoride, green (sodium heparin), lavender (EDTA), or pink (K2EDTA) tube(s). Spin down and send 4 mL of plasma refrigerate in a plastic vial.
Draw blood in a plain, red-top tube(s). Spin down and send 4 mL of serum refrigerate in a plastic vial.
Note: Cocaine and cocaethylene are more stable in fluoride-preserved plasma than serum.
Warm OK; Cold OK
Samples exposed to repeat freeze/thaw cycles, serum gel tubes, plasma gel tubes, plasma collected in lt blue sodium citrate, and whole blood are unacceptable.
|Varies||Refrigerated (preferred)||14 days|