1. The problem statement, all variables and given/known data I need to determine the concentration of resveratrol in my sample of wine. How would i do this using spectrophotometry? I know it has an absorbance of 306nm in an ethonal solution, but i've only good wine. Do I create an absorbance graph of known resveratrol concentrations in ethanol at306nm and create a graph, then measure the absorbance of the wine and compare it to the graph?