Please can you answer my question I have an extract that I dried and made different concentrations to calculate the percentage of phenolic compounds using Gallic acid as a standard using the Folin reagent method. After I took all the readings and represented them graphically I have calculated x value and it was 27.834 microgram by this equation y = 0.0175x + 0.0029 R² = 0.9994, where y is the absorbance of my sample which was 0.49 . now I want a way to convert x value into mg/ml and then calculate the amount of phenolic content present in the extract, knowing that the weight of the extract is 15.748 grams. If possible, a clear method for all calculations... Many thanks in advance