The Van Deemter Equation Describes Plate Height in Terms of Constants

question 6

Multiple Choice

The van Deemter equation describes plate height in terms of constants A,B,C,and the linear velocity,u_x.Which statement is NOT true for the van Deemter equation?

• A)A takes into account multiple pathways through the column.The value of A is column specific and independent of linear flow.
• B)B takes into account longitudinal diffusion of the analyte in the mobile phase.The value of B is column specific and the impact of B on the plate height is inversely proportional to the linear velocity.
• C)C takes into account equilibrium time between the stationary and mobile phase.The value of C is column specific and the impact of C on plate height is proportional to the linear velocity.
• D)To minimize plate height,the optimal flow rate is the minima for the plot of Versus flow rate.
• E)Linear velocity is the flow rate of the mobile phase.

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