Clinical Chemistry Answers for Quiz No. 4

Question 1 answer

By Prof .Dr. Hoda Hagras


1- What is the relationship between A and %T? Why do we measure A units instead of %T?

· A = 2- log %T

· %T = percent transmittance

· A = absorbance. At 100%T, A = 0.

      • It makes more sense to use absorbance because when you are measuring concentrations, as concentrations increase, absorbance will proportionally increase as well. Transmittance would decrease with increased concentrations.