Must be separated from cells within 2 hours of collection. Haemolysis must be avoided.
4 mL blood. K2EDTA Trace element tube (navy blue top). Trace element tubes with either heparin or no additive are also acceptable.
A full micro EDTA tube
Mon -Fri, 0800-1630
Atomic Absorption Spectroscopy
9.0 - 17.0 umol/L The reference interval quoted is for non-fasting, random samples. Values are slightly higher for fasting, morning samples (10.7 - 18.3 umol/L). As zinc is highly protein-bound, calculation of an adjusted zinc level is appropriate for hypoproteinaemic patients: Adjusted Plasma Zinc = plasma zinc x (77/Total protein g/L)
Plasma copper may be measured on the same sample.
If sending from an outside laboratory specimen must be sent separated. Plasma must be separated from Trace Element tube within 2 hours of collection.