B-term: longitudinal diffusion (A)

Abstract This animation makes clear that peaks broaden by diffusion and shows also that this diffusion effect is stronger with higher flow rates.

Swiffy output

Introduction to GC
Harold McNair. Introduction to GC (Video)
Harold McNair. GC Instrumentation. (Video)
Harold McNair. GC capillary columns (Video)
Harold McNair. GC detectors (Video)
Harold McNair. Quantitative and qualitative analysis (Video)
Lee Polite. GC resolution (Video)
Lee Polite. GC resolution whiteboard tutorial (Video)
Separation parameters in GC
Resolution 1 variable. (A)
Resolution Tool (3 variables) (A)
Lee Polite. How to use the resolution tool (Video)
The Van Deemter equation
A-Term: eddy diffusion (A)
B-term: longitudinal diffusion (A)
Selectivity (A)
Parameters influencing retention time
Temperature programming (A)
Lee Polite. GC temperature programming (Video)
Plate height equations
Asymmetry factor (A)
The resolution equation
Peak width and peak broadening
Qualitative analysis: identification
Rules of thumb & checklist
Some 'bad' GC chromatograms
FAQ's
GC basics course
GC Modeling Tool (Restek)

Home > GC Basics. Text and Video presentations by Harold McNair and Lee Polite