Chromatographic Fingerprint and Quantitative Analysis of Commercial Pheretima aspergillum (Guang Dilong) and Its Adulterants by UPLC-DAD

Table 3

Precision, repeatability, stability, and recovery of six nucleosides of commercial Guang Dilong.

		Precision
	Analytes	Intra-day	Inter-day	Repeatability	Stability	Recovery, mean (RSD%)
	Samples, n	6	3	6	6	3
1	Hypoxanthine	0.10	0.15	2.84	1.83	98.25 (2.67)
2	Xanthine	0.11	0.15	1.83	2.51	99.34 (2.57)
3	Uridine	0.10	0.19	2.00	1.65	100.69 (0.13)
4	Inosine	0.22	0.20	2.36	1.20	98.53 (1.07)
5	Guanosine	0.31	0.22	2.60	2.20	100.80 (1.67)
6	Adenosine	0.13	0.17	2.20	0.70	101.68 (0.81)

Reported as RSD%, unless indicated otherwise.