Table 3.

Benchtop Stability in Plasma (A) or Plasma Pre-Stabilized with 0.1% HCl (B)

A	3 ng/mL		400 ng/mL
Time (hr)	GM (ng/mL)	DEV from fresh (%)	GM (ng/mL)	DEV from fresh (%)
0 (Fresh)	3.12	-	395.32	-
2	2.87	−8.01	366.58	−7.27
4	2.41	−22.81	312.82	−20.87
8	2.15	−30.96	255.20	−35.44
24	0.87	−72.00	87.35	−77.90

B	3 ng/mL		400 ng/mL
Time (hr)	GM (ng/mL)	DEV from fresh (%)	GM (ng/mL)	DEV from fresh (%)
0 (Fresh)	3.40	-	426.78	-
2	2.86	−15.80	432.73	1.40
4	2.99	−11.94	417.52	−2.17
8	2.98	−12.39	407.11	−4.61
24	2.36	−30.41	311.47	−27.02

Abbreviations: GM, grand mean; DEV (%) relative deviation from nominal value