Say my compound is M5(ABO4)3OH, where my A changes for two different element. When I do UV-Vis of it, I get the data at different absorbance intensity. So should I plot it different or in one graph or should I normalize the data?
I suggest plotting the extinction coefficient (absorbance divided by concentration and pathlength) on the y-axis and wavelength on the x-axis. The extinction coefficient is a property of the solute in the particular solvent, whereas the absorbance depends on the concentration.
On the other hand, if your intention is simply to show that the peak absorption wavelength differs between the two substances, then plot the normalized spectra, where the absorbance is divided by the maximum absorbance of each substance. The y-axis thus goes from 0 to 1.
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