Table 1.

Retention times and equation of calibration curve, correlation coefficients (r), limit of detection (LOD) and limit of quantification (LOQ) values for studied isoquinoline alkaloids.

Alkaloid	tR	Equation of Calibration Curve	r	LOD [mg/mL]	LOQ [mg/mL]
Berberine	32.95	y = 70,984,852x − 3,300,769	0.9990	0.0128	0.0422
Magnoflorine	4.42	y = 25,635,805x − 251,782	0.9998	0.0039	0.0120
Palmatine	28.55	y = 52,900,150x + 732,112	0.9982	0.0009	0.0028