Determination of Platycodin D and Platycodin D3 in Rat Plasma Using Liquid Chromatography-Tandem Mass Spectrometry

Table 1

Calculated concentrations of PD in calibration standards prepared in rat plasma (𝑛=5 at each level).

	Theoretical concentration (ng/mL)								Slope	Intercept	𝑟^2
	50	100	200	500	1000	2000	5000	10000
Mean	50.9	98.7	191.1	493.5	1000.2	2031.5	5027.2	10309.1	0.00008	−0.001905	0.9982
CV (%)	3.2	6.1	5.1	5.1	4.5	6.3	3.0	2.7
RE (%)	1.8	−1.3	−4.5	−1.3	0.0	1.6	0.5	3.1

CV: coefficient of variation; RE: relative error.