Table 3.

Linear equations, correlation coefficients and linear range of the five drugs.

Compound	Regression equation	Correlation coefficient (r)	Linear range (μg/mL)
SN	y=4.4×104x+1.8×103	0.9997	0.005–10
ENO	y=3.8×104x−9.7×102	0.9997	0.005–10
LOM	y=7.2×104x+1.7×104	0.9992	0.005–10
TC	y=2.0×104x−7.5×102	0.9987	0.01–10
SMZ	y=7.5×104x+2.4×103	0.9997	0.001–10

y: peak area; x: concentration (μg/mL).