Beer’s Law
	A = e bC (Beer’s Law) where e = molar absorptivity (units M-1cm-1 ); b = sample thickness (cell pathlength) in cm; and C = conc. in M (mol/L). , is a property of the analyte and of wavelength; identification of the analyte (qualitative analysis) is possible from the spectrum (e vs 8). Note that the sensitivity m is equal to e b.