Table 1.

Results of least square regression analysis for piperine (PPN) for a sustainable normal-phase high-performance thin-layer chromatography (HPTLC) technique (mean ± SD; n = 6).

Parameters	Normal-Phase HPTLC
Linearity range (ng band−1)	10–1000
Regression equation	y = 53.29x + 579.90
R2	0.9998
Slope ± SD	53.29 ± 1.54
Intercept ± SD	579.90 ± 4.85
Standard error of slope	0.62
Standard error of intercept	1.98
95% confidence interval of slope	46.66–59.91
95% confidence interval of intercept	559.03–600.76
LOD ± SD (ng band−1)	3.38 ± 0.04
LOQ ± SD (ng band−1)	10.14 ± 0.12