Table 3.

The peak area (PA) and retention time (RT) of precision, stability, and repeatability, and recovery rate.

Analyte	Precision (n=6, % RSD)		Stability (n=12, % RSD)		Repeatability (n=6)		Recovery rate (n=3)
	PA	RT	PA	RT	PA	RT	Mean (%)	RSD (%)
Asp	1.03	1.23	1.93	1.78	2.49	2.34	98.32	1.07
Ser	2.34	2.13	2.35	2.41	1.35	1.23	99.32	1.65
Glu	1.58	1.34	1.45	1.39	1.93	1.53	97.54	1.98
Gly	1.32	1.45	2.12	2.30	2.54	1.93	98.78	0.78
His	2.13	2.01	1.67	1.52	2.19	1.83	100.92	2.13
Arg	1.93	1.78	1.86	1.72	1.67	1.52	97.29	1.39
Thr	1.29	1.32	1.35	1.42	1.39	1.09	102.72	2.07
Ala	1.34	1.54	1.37	1.29	1.73	1.34	103.25	1.94
Pro	1.73	1.93	2.09	1.97	1.82	1.32	100.83	1.85
Cys	2.01	1.78	2.21	2.05	2.23	1.92	96.57	2.79
Tyr	2.29	2.13	1.02	1.15	2.52	2.04	98.27	1.47
Val	1.92	2.13	1.35	1.43	1.59	1.34	99.35	2.48
Met	1.28	1.09	1.37	1.47	1.52	1.28	101.45	0.74
Lys	1.45	1.56	2.05	2.13	1.25	1.09	103.71	1.95
Ile	2.39	2.54	1.56	1.47	0.92	1.32	96.32	2.17
Leu	1.59	1.62	1.78	1.39	0.73	1.19	97.34	1.48
Phe	1.94	2.14	1.94	1.68	1.83	1.43	100.54	0.74
Trp	2.01	1.94	1.52	1.43	1.25	1.43	97.69	1.58