Table 1.

Some validation parameters for the HPLC determinations of the major polyphenols, ascorbic acid, and capsaicinoids.

	LOD μg/mL	LOQ μg/mL	Linearity range μg/mL	Linearity curve	R 2
Catechin	2.625	8.75	0–50	y = 0.331x − 2.5895	0.899
Naringenin-diglucoside	0.0318	0.106	0–50	y = 0.3906x − 3.0556	0.899
Quercetin-3-glucoside	1.083	3.61	0–50	y = 0.2188x − 0.781	0.983
Luteolin-glucoside	1.018	3.39	0–50	y = 0.1912x − 0.381	0.979
Kaempferol-derivative	0.0208	0.069	0–50	y = 0.4402x − 3.444	0.899
Ascorbic acid	2.500	0.750	30–120	y = 0.2736x − 2.4305	0.997
Nordihydrocapsaicin∗	0.003∗	0.008∗	0–0.07–1.1∗	y = 2000 + 07x + 3000 + 06∗	0.997∗
Capsaicin∗	0.004∗	0.01∗	0.1–5∗	y = 2000 + 07x + 3000 + 06∗	0.998∗
Dihydrocapsaicin∗	0.002∗	0.007∗	0.3–6∗	y = 2000 + 07x + 3000 + 06∗	0.998∗

^∗From previously published research work on HPLC determination of capsaicinoids by Daood et al. [27].