TABLE 1.

Intra- and interday precision and accuracy of agmatine analytical method in 5% BSA

% BSA in PBS
	Intraday			Interday
Concentration (ng/ml)	Measured Concentration (Mean ± S.D.; ng/ml)	Precision (% RSD)	Accuracy (% Bias)	Measured Concentration (Mean ± S.D.; ng/ml)	Precision (% RSD)	Accuracy (% Bias)
5	5.15 ± 0.40	7.81	3.08	4.78 ± 0.69	14.5	−4.48
8	8.26 ± 0.23	2.73	3.27	8.33 ± 1.02	12.2	4.11
80	78.3 ± 0.97	1.23	−2.18	79.3 ± 1.67	2.10	−0.83
800	785 ± 14.7	1.87	−1.84	789 ± 23.9	3.03	−1.33
1000	967 ± 15.6	1.62	−3.34	980 ± 33.9	3.46	−2.05