Biological Evaluation of Different Extracts of Aerial Parts of Nepeta deflersiana and Standardization of Active Extracts Using 8-Epi-7-Deoxyloganic Acid and Ursolic Acid by Validated HPTLC Method

Table 4

, linear regression data for the calibration curve of 8-epi-7-deoxyloganic acid and Ursolic acid (n=6).

Parameters	8-epi-7-deoxyloganic acid 1	Ursolic acid 2
Linearity range (ng/spot)	100-1000	100-1000
Regression equation	Y= 4.128X+ 806.99	Y= 11.91X + 237.26
Correlation (r^2) coefficient	0.9971	0.9955
Slope ± SD	4.128 ± 0.013	11.91 ± 0.045
Intercept ± SD	806.99 ± 38.77	237.26 ± 20.58
Standard error of slope	0.005	0.018
Standard error of intercept	15.82	8.40
	0.07 ± 0.0001	0.57 ± 0.04
LOD	10.51	12.49
LOQ	31.85	37.86