The following is an abstract for the selected article. A PDF download of the full text of this article is available here. Members may download full texts at no charge. Non-members may be charged a small fee for certain articles.
A Unit for Molar Absorptivity (Extinction Coefficient) with Theoretical Significance
Volume 7, Number 1 (Feb. 1953) Page 12-13
Using the nomenclature and symbols recommended by the Committee on Nomenclature in Applied Spectroscopy, absorptivity is defined by the equation(1) a = A/bcwhere A is the absorbance (optical density) for monochromatic radiation, b is the thickness, and c the concentration. Molar absorptivity is arbitrarily defined for thickness measured in centimeters and concentration in moles/liter. Since A is a pure number, molar absorptivity has the units liters/mole cm. There is at present no single name for this combination of units.