Effect of Betula pendula Leaf Extract on α-Glucosidase and Glutathione Level in Glucose-Induced Oxidative Stress

Table 1

Calibration curve equation, limit of detection (LOD), and limit of quantification (LOQ) for the standards observed in chromatograms.

Standard	Calibration curve equation		LOD (μg/mL)	LOQ (μg/mL)
Chlorogenic acid		0.9996	0.036	0.110
Ellagic acid		0.9997	0.005	0.031
Myricetin		0.9999	0.112	0.340
Protocatechuic acid		0.9999	0.005	0.016
Quercetin		0.9998	0.027	0.083
Rutin		0.9998	0.013	0.039

y: area under curve (AUC, arbitrary units); x: concentration of the standard (μg/mL).