Table 2.

Regression equations, linear ranges, lower limit of quantification (LLOQ) and limit of detection (LOD) for the determination of DQ, DQ-M and DQ-D in rat plasma

Compound	Regression equation	r	Linear range (ng/mL)	LLOQ			LOD (ng/mL)
				Concentration (ng/mL)	RSD (%)	RE (%)
DQ	y = 0.0174x + 0.3575	0.9971	3.00–3000	3.00	18.8	9.9	0.9
DQ-M	y = 0.3467x + 0.1277	0.9928	0.30–300	0.30	0.17	1.1	0.1
DQ-D	y = 0.0031x + 0.0003	0.9945	0.90–900	0.90	16.0	− 9.8	0.6

RSD relative standard deviation, RE relative error