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Longitudinal Diffusion given Van Deemter Equation Formula

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The Longitudinal diffusion is the contribution to the band broadening from the diffusion within the band. Check FAQs
B=(H-A-(C⋅u))⋅u
B - Longitudinal diffusion?H - Plate Height?A - Eddy diffusion?C - Resistance to mass transfer?u - Average mobile phase velocity?

Longitudinal Diffusion given Van Deemter Equation Example

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Here is how the Longitudinal Diffusion given Van Deemter Equation equation looks like with Values.

Here is how the Longitudinal Diffusion given Van Deemter Equation equation looks like with Units.

Here is how the Longitudinal Diffusion given Van Deemter Equation equation looks like.

100Edit=(220Edit-50Edit-(30Edit⋅5Edit))⋅5Edit
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Longitudinal Diffusion given Van Deemter Equation Solution

Follow our step by step solution on how to calculate Longitudinal Diffusion given Van Deemter Equation?

FIRST Step Consider the formula
B=(H-A-(C⋅u))⋅u
Next Step Substitute values of Variables
∴ B=(220m-50m-(30s⋅5m/s))⋅5m/s
Next Step Prepare to Evaluate
∴ B=(220-50-(30⋅5))⋅5
LAST Step Evaluate
∴B=100m²/s

Longitudinal Diffusion given Van Deemter Equation Formula Elements

Variables
Longitudinal diffusion
The Longitudinal diffusion is the contribution to the band broadening from the diffusion within the band.
Symbol: B
Measurement: Kinematic ViscosityUnit: m²/s
Note: Value can be positive or negative.
Formulas to find Longitudinal diffusionOpen Variable
Plate Height
The Plate Height is defined as the height of many narrow, discreet, contagious horizontal layers.
Symbol: H
Measurement: LengthUnit: m
Note: Value can be positive or negative.
Formulas to find Plate HeightOpen Variable
Eddy diffusion
The Eddy diffusion is the contribution from the non-equal paths of the column.
Symbol: A
Measurement: LengthUnit: m
Note: Value can be positive or negative.
Formulas to find Eddy diffusionOpen Variable
Resistance to mass transfer
The Resistance to mass transfer is the contribution to the band broadening from the non-mass transfer.
Symbol: C
Measurement: TimeUnit: s
Note: Value can be positive or negative.
Formulas to find Resistance to mass transferOpen Variable
Average mobile phase velocity
The Average mobile phase velocity is the speed at which the mobile phase travel through the column.
Symbol: u
Measurement: SpeedUnit: m/s
Note: Value can be positive or negative.
Formulas to find Average mobile phase velocityOpen Variable

Other formulas in Van Deemter Equation category

​Go Theoretical Plate Height given Van Deemter Equation
H=A+(Bu)+(C⋅u)
​Go Eddy Diffusion given Van Deemter Equation
A=H-(Bu)-(C⋅u)
​Go Resistance to Mass Transfer given Van Deemter Equation
C=H-(Bu)-(A)u
​Go Nernst Distribution Law Coefficient
k=(C1C2)

How to Evaluate Longitudinal Diffusion given Van Deemter Equation?

Longitudinal Diffusion given Van Deemter Equation evaluator uses Longitudinal diffusion = (Plate Height-Eddy diffusion-(Resistance to mass transfer*Average mobile phase velocity))*Average mobile phase velocity to evaluate the Longitudinal diffusion, The Longitudinal Diffusion given Van Deemter Equation formula is defined as the relation of carrier gas velocity with the maximum efficiency of the column and a maximum number of the theoretical plate. Longitudinal diffusion is denoted by B symbol.

How to evaluate Longitudinal Diffusion given Van Deemter Equation using this online evaluator? To use this online evaluator for Longitudinal Diffusion given Van Deemter Equation, enter Plate Height (H), Eddy diffusion (A), Resistance to mass transfer (C) & Average mobile phase velocity (u) and hit the calculate button.

FAQs on Longitudinal Diffusion given Van Deemter Equation

What is the formula to find Longitudinal Diffusion given Van Deemter Equation?
The formula of Longitudinal Diffusion given Van Deemter Equation is expressed as Longitudinal diffusion = (Plate Height-Eddy diffusion-(Resistance to mass transfer*Average mobile phase velocity))*Average mobile phase velocity. Here is an example- 100 = (220-50-(30*5))*5.
How to calculate Longitudinal Diffusion given Van Deemter Equation?
With Plate Height (H), Eddy diffusion (A), Resistance to mass transfer (C) & Average mobile phase velocity (u) we can find Longitudinal Diffusion given Van Deemter Equation using the formula - Longitudinal diffusion = (Plate Height-Eddy diffusion-(Resistance to mass transfer*Average mobile phase velocity))*Average mobile phase velocity.
Can the Longitudinal Diffusion given Van Deemter Equation be negative?
Yes, the Longitudinal Diffusion given Van Deemter Equation, measured in Kinematic Viscosity can be negative.
Which unit is used to measure Longitudinal Diffusion given Van Deemter Equation?
Longitudinal Diffusion given Van Deemter Equation is usually measured using the Square Meter per Second[m²/s] for Kinematic Viscosity. Square Meter per Hour[m²/s], Square Centimeter per Second[m²/s], Square Millimeter per Second[m²/s] are the few other units in which Longitudinal Diffusion given Van Deemter Equation can be measured.
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