I have some time series data of the absorbance of Br(adsbygoogle = window.adsbygoogle || []).push({}); _{2}formation using UV Vis spectroscopy and I need to figure out the extinction coefficient/ absorptivity.

The overall reaction is

BrO_{3}^{-}+5Br^{-}+6H^{+}-->3Br_{2}+3H_{2}O

which is expcted to go to completion

I know that the equation relating absorbance to concentration is

A=εcl

and I have times series A measurements and can calculate the initial concentrations of BrO_{3}, Br^{-}and the expected concentration of Br_{2}from the solutions I made. I just need to find ε.

I first attempted to plot the absorbance v. time and find the slope where it was most linear but I don't know how valid this approach is.

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# Extinction Coefficient from Time series data

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