Plasma and serum zinc concentrations: effect of time between collection and separation.
The effect of time between collection and separation of blood samples obtained from 9 subjects was examined with respect to plasma and serum zinc concentrations. There was a linear increase of 6% in zinc concentrations for the first 2 h that was similar for plasma and serum. Plasma zinc continued to increase linearly over the next 2 h, but increase in serum zinc concentrations was less for the second 2 h. It is concluded that differences between heparinized plasma and serum zinc concentration observed previously in this laboratory and elsewhere are attributable primarily to differences in time between collection and separation.
English
J L
JL
Department of Pediatrics, University of Colorado, Denver.
Hambidge
K M
KM
D000328:Adult; D002498:Centrifugation; D003018:Clot Retraction; D006493:Heparin; D006801:Humans; D010949:Plasma / Q000032:analysis; D013048:Specimen Handling; D013054:Spectrophotometry, Atomic; D013997:Time Factors; D015032:Zinc / Q000097:blood*
D006493:Heparin; D015032:Zinc