Endogenous L-Carnosine Level in Diabetes Rat Cardiac Muscle

Table 3

Stability of carnosine in rat cardiac muscle.

Concentration (μg⋅mL^−1)			Accuracy (%)	RSD (%)
	Added	Found (mean ± SD)
Three freeze-thaw cycles	1.02	1.10 ± 0.08	7.7	7.03
	8.13	7.37 ± 0.22		2.93
	32.51	36.51 ± 0.99		2.73
Room temperature for 24 h	1.02	0.97 ± 0.06		5.74
	8.13	8.55 ± 0.73		8.56
	32.51	35.86 ± 2.05		5.71
1-month stability	1.02	1.04 ± 0.11		10.19
	8.13	8.42 ± 0.16		1.95
	32.51	35.16 ± 1.68		4.79