Quality Evaluation of Artemisia capillaris Thunb. Based on Qualitative Analysis of the HPLC Fingerprint and UFLC-Q-TOF-MS/MS Combined with Quantitative Analysis of Multicomponents

Table 2

Results of the investigation of the linear relationship, LOD, and LOQ.

Reference substance	Regression equation	R^2	Linear range (ng)	LOD (ng)	LOQ (ng)
1-CQA	Y = 2231204X − 8098	0.9999	13.35 ∼ 534	1.60	5.34
NCA	Y = 2830658X − 5170	0.9999	5.15 ∼ 206	0.34	1.72
CA	Y = 2870573X − 117405	0.9999	192.3 ∼ 7692	1.54	7.69
Caffeic acid	Y = 4958993X − 7629	0.9998	1.90 ∼ 76.05	0.30	1.52
CCA	Y = 2656572X − 12630	0.9998	7.66 ∼ 306.24	0.51	2.55
p-Hydroxyacetophenone	Y = 2885362X − 7875	0.9999	3.05 ∼ 121.92	0.41	1.63
1,3-DiCQA	Y = 2995412X − 1885	0.9999	1.77 ∼ 70.84	0.24	1.18
Rutin	Y = 1638734X − 1384	0.9999	2.53 ∼ 101	0.40	1.68
Hyperoside	Y = 2406676X − 5708	0.9999	8.31 ∼ 332.4	0.33	1.66
Isoquercetin	Y = 1973858X − 1855	0.9999	2.90 ∼ 116	0.23	1.74
3,4-DiCQA	Y = 2669900X − 7344	0.9999	5.04 ∼ 201.6	0.67	2.69
3,5-DiCQA	Y = 3267110X + 5860	0.9999	122.30 ∼ 4892	1.73	3.46
4,5-DiCQA	Y = 2863719X − 7095	0.9999	13.65 ∼ 546	1.09	5.46