Hello, I wonder about calculating the extinction coefficient of colorful solutions.
I measured the absorbance of some solutions with a UV-vis spectrophotometer (Left).
Using two relations, I calculated the absorption coefficient (α) and extinction coefficient (k).
The final k values of solutions I calculated are about 10^-4 ~10^-5.
Are the k values reasonable considering the solution colors in the optical images?
I'm not sure whether the k values should be higher.
Please give me some advice if you have any ideas.
Thank you.
However, Absorption coefficient is Extinction coefficient. By Burns (1993) this value alpha = log ((I0)/I)/d, where I0 and I are the intensities of incident and emergent light, respectively; d is the thickness, in cm, of the material or optical path length in the medium. Absorption coefficient and Extinction coefficient are function of the wavelength or wavenumber. May be, you mean the Molar extinction coefficient?
I think the values 10^-4 ~10^-5 are more likely the oscillator strength.
Extinction coefficients frequently are expressed on a molar concentration basis. That requires knowledge of both the concentration and the molecular weight.
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