Combined Band Broadening in a Column

The van Deemter equation combines the different contributions in a simplified equation  

The contribution of stagnant mobile phase is valid only tvith large particles and is therefore usually neglected in the van Deemter equation for high-performance systems. 

The contribution of resistance to mass transfer in the mobile phase can be neglected in GC, but not in HPLC. 

In open tubular columns, there is no eddy diffusion and the band broadening can be expressed by the Golay equation  

The Golay equation is one of the most prominent equations in modern chromatography. 

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