From: Effect of altitude and solvent on Psidium guajava Linn. leaves extracts: phytochemical analysis, antioxidant, cytotoxicity and antimicrobial activity against food spoilage microbes
Standards
LOD (µg/ml)
LOQ (µg/ml)
Linear range (R2)
Regression equation
Fisetin
4.12
12.50
0.9998
y = 184397x − 215,817
Quercetin
1.97
5.99
0.9999
y = 87220x + 213,388