Evaluate industrial exposure to manganese
Immediately following collection, mix sample thoroughly by gentle inverting 8 - 10 times to prevent clotting
Ambient (preferred) - 14 days
Refrigerated - 14 days
Frozen - 14 days
Freeze/thaw cycles - stable x 3
Samples not submitted in certified metal-free plastic transport tube
Inductively-coupled plasma/mass spectrometry (ICP-MS)
Environmental exposure: < 2.5 μg/L