Contact the laboratory at 266-1500 (Option 4) to request Protein-Free Filtrate vials
* This volume does not allow for repeat testing
collect
mix/centrifuge
submit 
In ice pre-chill red top conical tube with 7% Perchloric Acid a at least 5 minutes prior to collection
Collect 4.0 mL whole blood in a lavendar top tube - EDTA
Immediatley after collection pour 4.0 mL whole blood into the iced pre-chilled red top conical tube with 7% perchloric acid
Vigorously mix
Let mixture stand 10 minutes
Centrifuge and separate 4.5 mL supernatant fluid (Protein-free Filtrate) in a plastic vial
Transport
0.30-1.50 mg/dL
1 to 3 days
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