Objectives: We investigated the stability of 36 analytes related to clinical chemistry in a controlled storage study.
Design And Methods: Blood was collected from 11 subjects and was maintained for 45 min, 2.5 h, 5 h, or 24 h after phlebotomy before centrifugation.
Results: Statistically significant changes were observed only for parathyroid hormone, osteocalcin, zinc, pyridoxal 5'-phosphate, and homocysteine.
Conclusions: These studies indicate that many analytes in clinical chemistry are stable for 24 h before centrifugation.
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