Ecotech Acoem Serinus 10 - Appendix E. Beer-Lambert Law

Parts List and Schematics
Page 223
Appendix E. Beer-Lambert Law
The Beer-Lambert equation, shown below, is used to calculate the concentration of Ozone from the
ratio of the two light intensities measured:
I/I0 = exp (-acd)
Equation 1 – Beer-Lambert Law
Where:
 I is the light intensity measured with Ozone in the gas sample
 I0 is the light intensity measured with no Ozone in the gas sample
 a is the Ozone absorption coefficient at 253.7 nm (1.44 x 10 - 5 m2/mg)
 c is the mass concentration of Ozone in mg/m
3
 d is the optical path length in m