Assessing the Quality of Calyx of Physalis alkekengi L. var. franchetii Based on Quantitative Analysis of Q-Marker Combined with Chemometrics and Machine Learning Algorithms

Table 2

Equations of linear regression, correlation coefficient, and linear range of chemical markers.

Compounds	Equation of regression	r	Linear range (μg/mL)
Luteoloside	y = 20.844x + 10.85	0.9999	2.5–400
Rutin	y = 18.941x + 3.2715	0.9996	0.3125–20
Physalin O	y = 1.221x + 1.2344	0.9998	5–500