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The page below is a sample from the LabCE course Minimizing Pre-Analytical Variability During Venipuncture and Urine Sample Collection Processes. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Storage Temperature

Likewise, delays in analysis following the arrival and preparation of samples should cause the laboratory to look for methods to retain sample integrity and minimize the variability associated with storage time.
Where batch testing is employed, and analytical runs are infrequent, the laboratory should conduct temperature studies as to the optimal storage conditions (ambient, refrigerated, frozen, or even deep-frozen) to retain the concentration or activity of the analyte(s) of interest. The goal of such stability testing is to establish time limits at each storage temperature.