Table 1. Results for validation parameters (Dried pea).

	Nicotinic acid	Nicotinamide
Linear regression equation	y = 371,678x − 106,410	y = 649,469x + 33,576
r2	0.9979	0.9978
Range of linearity (μg/mL)	1–10	1–10
Repeatability (RSD, n = 10)	2.0%	2.0%
Reproducibility (RSD of intra-day studies, n = 16)	2.08%	2.04%
LOD (μg/mL)	0.005	0.004
LOQ (μg/mL)	0.018	0.013
Accuracy (a, recovery; b, RSD; n = 10)	104.2%a, 0.34%b	96.4%a, 0.28%b

x, amount (μg/mL); y, peak area; r², correlation coefficient;

LOD, limit of detection; LOQ, limit of quantification; RSD, relative standard deviation.