Absorbance (A)
Definition
The base-10 logarithm of the ratio of incident to transmitted light intensity, A = log10(I0/I). Dimensionless. Linear with concentration in the working range; departs from linearity above roughly A = 1.5 because of stray light, detector saturation and analyte self-absorption.
Related terms
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- Diode Array Detector (DAD)
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Explained in
- UV-Vis Spectrophotometry and the Beer-Lambert LawThe base-10 logarithm of the ratio of incident to transmitted light intensity, A = log10(I0/I). Dimensionless. Linear with concentration in the working range;...