Analytical Chemistry
Molar absorptivity, also known as molar extinction coefficient, is a measure of how strongly a chemical species absorbs light at a given wavelength, defined as the absorbance per unit concentration and path length. This property is fundamental in UV-Visible spectroscopy because it provides insight into the concentration of an absorbing species in a solution by correlating the absorbance measured with its molarity and the path length through which light travels.
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