I am not getting R^2 value nearer to 0.99 for standard graph?

i am doing total phenol by FC method i got R2 value 0.178 when dilution intervals are 150micro liters of Gallic acid microliter/ml and FC 150 microliter with 7.5% Na2CO3 500 microliter repeated...

17 March 2023 1,364 2 View