Teledyne 6200E - Sulfides Analyzer - Manual (Page 205)

Model 6200E Instruction Manual Theory Of Operation
M6200E Rev: A1 205
Figure 10-1: UV Absorption
The equation for defining the average intensity of the UV light (Ia) is:
( ) ( ) [ ]
2 0
SO ax exp 1 I Ia
− − =
Where: (Equation 10-3)
I
0
= Intensity of the excitation UV light.
a = The absorption coefficient of SO
2
.
SO
2
= Concentration of SO
2
in the sample chamber.
x = The distance between the UV source and the SO
2
molecule(s) being affected
(path length).