Figure 1.

Imprecision and bias calculated for results obtained at baseline and after 10 h of storage of whole blood (in lithium-heparin or serum tubes). Data on imprecision (A) shows CV calculated from results obtained at baseline and after storage of whole blood in lithium-heparin or serum tubes at 21°C for 10 h. The analytical imprecision is indicated as grey columns and the goal imprecision as the total height of the columns. Data on bias (B) shows the mean bias between baseline and results obtained after storage of whole blood for 10 h. The columns indicate bias goal. Data for analytical- and goal-CV as well as bias goal are indicated for each analyte in Table II.