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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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18.7.3 Linear Chromatography

In analytical applications of elution chromatography very small feed pulses are used. Thus, concentrations are invariably very low and the isotherms are almost always linear. If the pulse is differential (tF is very small compared to the time required to elute the components), Eq. (18-75) for the Lapidus and Amundson solution applied to a differential pulse can be simplified to (Wankat, 1990)

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(18-76)

where t is the time after the pulse is fed to the column. Equation (18-76) is the Gaussian solution for linear chromatography, which in various forms is extensively used to predict outcomes for analytical chromatography. ...

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