Table II.

Parameters and Linearity Data of Both ETA and PZA Calibration Curves

Standard curves	Range, μg/mL	Calibrators	Slope	Y-intercept	R 2
ETA calibration
Day 1	0.1–3.0	7	0.5384	−0.0147	0.9995
Day 2	0.1–3.0	7	0.5394	−0.0134	0.9994
Day 3	0.1–3.0	7	0.5391	−0.0142	0.9995
PZA calibration
Day 1	0.1–3.0	7	0.4996	0.0102	0.9993
Day 2	0.1–3.0	7	0.4989	0.0103	0.9995
Day 3	0.1–3.0	7	0.4992	0.0104	0.9994

ETA ethionamide, PZA pyrazinamide