One 6 mL royal blue (no additive) top tube.

Also acceptable: Plasma collected in royal blue (EDTA) top tube or royal blue (sodium heparin) top tube.

2 mL serum refrigerated (Min: 0.7 mL).

* Collection Instructions *

• Carefully clean skin prior to venipuncture.
• Avoid worksite collection.
• Avoid hemolysis.
• Use the royal blue top "Trace Metal" evacuated tube, which is available with EDTA, heparin or no additives.
• Do not use gel barrier tubes.
• Centrifuge serum or plasma specimens within 1 hour of collection.
• Immediately separate serum and plasma specimens from the cells into trace element collection vial(s).

Patient Preparation

Patient should refrain from taking vitamins or mineral supplements at least three days prior to specimen collection

Ambient: 8 hours

Refrigerated: 14 days

Frozen: 30 days