Determination of Free Amino Acids in Three Species of Duckweed (Lemnaceae)

Table 4

Precision, stability, repeatability, and accuracy of the investigated analytes ().

Number	Compound	Precision		Stability RSD (%)	Repeatability RSD (%)	Accuracy
		Intraday RSD (%)	Interday RSD (%)			Recovery (%)	RSD (%)
1	Tyr	1.36	1.85	0.94	3.05	98.56	1.33
2	Ala	2.60	3.31	3.47	3.09	102.49	2.18
3	Glu	2.07	2.56	2.10	2.11	106.94	3.76
4	Phe	0.66	1.03	2.60	1.66	97.23	4.03
5	His	1.07	3.30	1.58	1.17	98.32	2.20
6	Ile	0.97	3.21	3.82	0.71	99.09	3.57
7	Asp	1.96	3.98	2.42	1.84	97.86	2.36
8	Lys	2.70	3.51	1.44	0.99	102.30	3.02
9	Gly	1.66	2.65	3.43	3.74	104.48	3.07
10	Val	2.42	2.89	3.30	0.83	107.51	1.52
11	Cit	1.47	1.88	3.12	3.86	99.14	2.21
12	GABA	3.14	2.32	2.27	0.82	102.54	3.41
13	Cys2	2.53	4.27	3.24	1.49	96.60	1.27
14	Pro	1.21	3.39	1.09	2.09	101.94	3.20
15	Trp	0.37	3.93	1.36	1.39	99.11	3.46
16	Leu	1.50	3.90	3.40	1.50	95.27	3.61
17	Arg	2.72	4.15	3.72	1.45	102.37	1.79
18	Cys	2.82	3.63	1.16	0.53	103.65	3.82
19	Hpro	3.05	2.23	0.87	2.38	97.55	3.91
20	Met	1.57	3.02	1.26	0.52	104.89	2.14
21	Thr	2.11	2.13	1.77	3.01	95.97	3.00
22	Asn	2.93	2.85	1.48	3.68	105.35	2.95
23	Gln	0.97	1.87	1.22	2.72	102.33	2.16
24	Ser	2.71	2.86	0.98	1.48	97.44	1.88