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

Table 2

Regression equations, correlation coefficients, linear ranges, and LOD and LOQ of six target analytes.

	Analytes	Regression equation	r	Liner, μg/mL	LOD, μg/mL	LOQ, μg/mL
1	Hypoxanthine	y = 33.148x – 0.7255	0.9999	0.682-33.5	0.102	0.341
2	Xanthine	y = 34.489x – 2.5796	0.9999	0.606-29.8	0.0918	0.303
3	Uridine	y = 22.413x + 0.3431	0.9999	1.08-54.5	0.164	0.542
4	Inosine	y = 17.695x + 0.5263	0.9999	1.66-83.2	0.250	0.831
5	Guanosine	y = 21.392x – 0.9505	0.9999	1.14-56.8	0.172	0.572
6	Adenosine	y = 31.131x – 0.5006	0.9999	0.824-41.3	0.125	0.412

Correlation coefficient.