Table II.

Stability of URM and UNO in Rat Plasma

Conc. (ng/mL)	URM		UNO
	Mean accuracy (%)	CV (%)	Mean accuracy (%)	CV (%)
Room temperature for 8 h
3	101.0	6.9	101.4	2.7
1,500	99.7	1.0	97.3	4.6
Three freeze-thaw cycles
3	101.7	2.1	104.8	4.5
1,500	102.2	3.1	99.2	2.6
< − 60°C for 2 weeks
3	100.8	6.8	98.4	4.8
1,500	101.8	2.0	97.8	3.5