8 Problem The true absorbance of a certain sample is n but t

8 Problem: The true absorbance of a certain sample is\" n but there is 1.0% stray light that strikes the detector. Calculate the measured absorbance

Solution

Here

A_true = log T^-1 = 1

ot, T = 10^-1 = 0.1

equation when stray light is used

A_obs = log [(1-T)S +T]^-1

S = fraction of stray light = 1/100= 0.01, T = transmittance = 0.1

A_obs = log [(1-0.1)0.01 +0.1]^-1 = or log [0.109]^-1 = 0.9625

hence measured absorbance = 0.9625