One Single Amino Acid for Estimation the Content of Total Free Amino Acids in Qingkailing Injection Using High-Performance Liquid Chromatography-Diode Array Detection

Table 2

Intra- and interday precision of the fourteen investigated AAs.

AAs	Concentration; (mg/mL)	Intraday; (𝑛=6); RSD%	Interday; (𝑛=6); RSD%	AAs	Concentration; (mg/mL)	Intraday; (𝑛=6); RSD%	Interday; (𝑛=6); RSD%
Asp	0.101	1.63	2.11	Tyr	0.080	0.79	3.39
	0.303	2.18	2.14		0.241	1.16	4.75
	0.505	2.20	3.99		0.401	1.96	2.07
Glu	0.293	1.42	3.08	Val	0.127	1.00	3.21
	0.880	2.19	2.10		0.380	1.22	3.41
	1.467	2.14	4.36		0.634	2.11	1.15
Ser	0.069	0.75	1.34	Ile	0.063	0.84	2.21
	0.207	1.48	3.33		0.190	1.13	4.38
	0.345	2.06	2.36		0.316	2.14	2.37
Gly	0.305	0.78	2.68	Leu	0.109	0.92	2.01
	0.916	1.32	3.45		0.328	1.13	4.88
	1.527	2.02	1.60		0.547	2.04	2.50
Arg	0.141	1.23	0.20	Phe	0.166	1.02	3.58
	0.422	1.74	2.86		0.498	0.98	2.01
	0.703	1.90	4.09		0.831	1.98	4.41
Ala	0.303	0.84	3.74	Orn	0.300	1.08	3.96
	0.909	1.25	3.34		0.901	0.96	3.23
	1.514	2.06	1.29		1.501	1.97	4.02
Pro	0.655	0.92	4.23	Lys	0.076	1.21	3.91
	1.964	1.36	3.42		0.228	0.92	2.57
	3.274	2.06	1.65		0.380	2.02	4.47