One 5 mL royal blue (no additive) top tube.

Transfer 2 mL serum refrigerated (Min: 1 mL).

* Collection Instructions *

• Draw one royal blue top tube of blood and discard.
• Draw second royal blue top tube.
• Allow to clot in upright position.
• Centrifuge and pour (do not pipette) the serum into a metal-free tube.

Tests performed on a specimen submitted in a non-trace element tube or non acid washed/non metal free container may not accurately reflect the patient's level. If a non-trace element tube/container is received, it will be accepted for testing. However, elevated results shall be reported with a message that a re-submission with a trace element tube/container is recommended.

Ambient: 5 days

Refrigerated: 10 days

Frozen: 21 days