Rodrigues equation - Alchetron, The Free Social Encyclopedia

The Rodrigues equation is an equation used in chromatography to describe the efficiency of a bed of permeable (large-pore) particles. It is thus an extension of Van Deemter's equation. It was developed by Alirio E. Rodrigues et al..

Equation

The equation is:

H E T P = A + B u + C ⋅ f ( λ ) ⋅ u

Where

HETP is the height equivalent to a theoretical plate

A = Eddy diffusion

B = Longitudinal diffusion

C = Resistance to mass transfer

u = Flow rate

f ( λ ) = 3 λ [ 1 t a n h ( λ ) − 1 λ ]

λ = Intraparticular Péclet number

References

Rodrigues equation Wikipedia

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