Table 2.

Stability of caudatin in rat plasma and tissue homogenate (n = 5).

	Stability	Added C (ng/mL)	Found C (ng/mL)	Accuracy R.E. (%)
plasma	48 h at room temperature	10	9.1	−9.0
		100	95.7	−4.3
		800	789.4	−1.3
	1 month at −20 °C	10	9.6	−4.0
		100	96.2	−3.8
		800	814.2	1.8
	three freeze-thaw cycles	10	10.4	4.0
		100	94.2	−5.8
		800	759.1	−5.1
tissue homogenate	48 h at room temperature	10	10.3	3.0
		100	92.3	−7.7
		800	745.5	−6.8
	1 month at −20 °C	10	9.2	−8.0
		100	93.2	−6.8
		800	736.6	−7.9
	three freeze–thaw cycles	10	9.4	−6.0
		100	105.4	5.4
		800	857.3	7.2