Table 2.

The calibration curves of formononetin, ononin, calycosin, calycosin-7-O-glucoside and mangiferin in rat plasma.

Analyte	Regression equation	Correlation coefficient (r)
formononetin	y = 7.140 × 10−2 x + 2.316 × 10−2	0.9978
ononin	y = 6.854 × 10−2 x + 5.510 × 10−2	0.9943
calycosin	y = 4.014 × 10−2 x + 6.446 × 10−2	0.9926
calycosin-7-O-glucoside	y = 9.82 × 10−2 x + 6.354 × 10−2	0.9975
mangiferin	y = 7.185 × 10−4 x + 8.95 × 10−5	0.9992