Evaluation of the Influence of Sulfur-Fumigated Paeoniae Radix Alba on the Quality of Si Wu Tang by Chromatographic and Chemometric Analysis

Table 2

Linear regression data, LOD, LOQ, precisions, repeatabilities, and recoveries of ten marker compounds in SWT (n = 6).

Analyte	Regression equation		Linear range (µg/mL)	LOD (µg/mL)	LOQ (µg/mL)	Precision, RSD (%)		Repeatability RSD (%)	Recovery
						Intraday	Interday		Average recovery (%)	RSD (%)
Gallic acid		0.9990	11.30–182.00	1.70	5.65	1.10%	1.9%	2.16%	99.67	1.31
5-Hydroxymethylfurfural		0.9994	4.00–64.40	0.02	0.06	0.26%	0.43%	1.77%	101.58	1.25
Cianidanol		0.9990	14.00–239.00	0.53	1.75	0.49%	0.59%	3.03%	101.37	2.17
Albiflorin		0.9988	49.00–789.00	3.71	12.25	1.44%	2.12%	2.72%	98.45	2.33
Paeoniflorin		0.9990	22.30–357.00	1.69	5.57	2.00%	2.31%	2.92%	102.75	1.78
Ferulic acid		0.9991	1.06–17.00	0.02	0.07	0.38%	1.05%	2.86%	99.63	1.15
Verbascoside		0.9994	3.80–61.00	0.15	0.48	2.73%	2.82%	2.87%	98.69	2.73
Senkyunolide I		0.9998	4.80–78.00	0.04	0.15	0.35%	0.54%	2.97%	102.55	2.06
Senkyunolide A		0.9989	9.91–158.50	0.18	0.61	0.61%	0.93%	2.61%	101.58	2.15
Z-Ligustilide		0.9990	11.30–182.00	0.86	2.83	0.21%	0.37%	2.41%	99.67	1.79