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Stationary Phase

The stationary phase is the fixed phase within a chromatography system, responsible for selective interactions with the analyte.

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The statement of the theorem

Define the stationary phase

\mathbf{S}

as a fixed solid matrix with a defined pore structure and surface area

A_{surf}

. The interaction capacity of the phase for analyte

i

is modeled by the adsorption equilibrium

q_i = f(C_i, T)

, where

q_i

is the adsorbed concentration. The phase resistance

R_S

is proportional to the effective surface area and the interaction strength

\chi_{i}

: \n

R_S \propto A_{surf} \cdot \chi_{i}