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Adsorption Chromatography

Adsorption chromatography utilizes a stationary phase that selectively adsorbs components of a mixture, leading to separation based on differing affinities.

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The statement of the theorem

Let

C_i

be the concentration of analyte

i

in the mobile phase and

q_i

be the concentration of analyte

i

adsorbed onto the stationary phase. The equilibrium relationship is described by the adsorption isotherm, which relates

q_i

and

C_i

at constant temperature

T

: \n

\frac{q_i}{C_i} = K_{ads, i} + \frac{1}{m} \frac{q_i}{C_i}

\nwhere

K_{ads, i}

is the adsorption equilibrium constant and

m

is the slope of the isotherm (e.g., Freundlich or Langmuir model parameters).