Plain red top or SST tube.
Onsite [NJH]: Transport to lab within 1 hour.
Offsite: Separate serum from cells within 2 hours by centrifuge and aliquot into a labeled polypropylene or similar plastic tube.
Preferred volume: 1 mL serum
Minimum volume: 0.15 mL serum
Offsite: Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability after cell separation:
Serum: 7 days / Urine: 5 days at RT (15-25°C)
Serum: 22 days / Urine: 5 weeks at 2-8°C
Serum: 1 year / Urine: 6 months frozen at ≥ -20°C
Monday - Friday
Ion Selective Electrode
4 hour routine, 1 hour STAT
Ion Selective Electrode (Calcium, serum);CAX
Newborn - 23 months
2 years - 15 years