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Blue Top (Citrate Tube)
Specimen Requirements
Preferred:
Container/Tube: Blue Top (Citrate Tube)
Minimum Volume: 1 mL Blood
Collection Instructions: Spin immediately.
Specimen Stability
Ambient:4 hours
Refrigerate: 4 hours
Frozen: aliquot for longer storage. -20: 2 weeks or -70 6 months
Lab Handling
Analyze within 4 Hours:
Spin immediately. Remove the top 2/3 plasma within 1 hour and spin again. Remove the top 2/3 of the plasma from
this sample for testing.
Analyze > 4 Hours: Remove the top 2/3 plasma within 1 hour and spin again. Remove the top 2/3 of this sample and freeze at -70 degrees