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Storage Time

Because testing may not immediately ensue following the arrival of the sample in the laboratory, or immediately after the serum or plasma is harvested from whole blood, an important consideration becomes storage time prior to analysis.
This pre-analytical variable further challenges the sample integrity, as the more time that elapses between collection and analysis, the more opportunity exists for the analytes of interest to change. Laboratories should conduct stability studies to accurately assess the effects of storage time on sample integrity for its full menu of test offerings.