Navy blue metal free vial/tube (no additive)

1. Allow sample to clot
2. Spin
3. Carefully pour serum into a Metal free transfer vial/tube, labelled as serum, within two (2) hours of sample collection

Metal free transfer vial/tube

Navy blue metal free vial/tube with EDTA

Immediatley following collection, mix sample thoroughly by gently inverting 8 - 10, times to prevent clotting

1. Spin
2. Carefully pour plasma into a Metal free transfer vial/tube, labelled as EDTA plasma, within two (2) hours of sample collection

Metal free transfer vial/tube

Ambient (preferred) – 7 days

Refrigerated – 7 days

Frozen – 14 days

Freeze/thaw cycles - stable x 1

Ion-selective electrode (ISE) potentiometry

Environmental exposure: <0.2 mg/L