Table 2.

Regression equations, correlation coefficients (r), linearity ranges, and lower limit of quantitation (LLOQ) for GAS, HBA, and RIN in plasma.

Marker compounds	Calibrations	r	Linear range (μg/mL)	LLOQ (μg/mL)
GAS	y = 19689.46x − 89461.47	0.9907	1–250	0.50
HBA	y = 46483.29x − 51323.08	0.9994	1–100	0.50
RIN	y = 36880.5x + 3717.92	0.9916	0.25–50	0.38