Question

What is the molar absorptivity of a 1.0 x10-⁵ M analyte with an absorbance reading of 0.003 at 517 nm wavelength?

Answer 1

The molar absorptivity (at 1 cm cuvette):

$E=\frac{A}{C}$

C = concentration

A= absorbance

$E= \frac{0.003}{1.0 \times 10^{-5}} = 0.003 \times 10^5 = 300 \;L/mol \;cm$