Table 1.

The linearity of the assay for 20(R)-Rh1, 20(S)-Rh1, 20(R)-Rg3, and 20(S)-Rg3.

Analytes	Calibration curves (y = ax + b)	Linear range (ng/mL)	R 2
20(R)-Rh1	y = 0.0612x + 0.0638	0.5–95.0	0.9986
20(S)-Rh1	y = 0.0304x + 0.1010	0.5–99.2	0.9935
20(R)-Rg3	y = 0.0574x + 0.0468	0.5–99.2	0.9990
20(S)-Rg3	y = 0.0581x + 0.0867	0.5–100.0	0.9947