This GC linear velocity calculator determines average linear gas velocity (cm/s) and outlet flow (mL/min) using column dimensions, inlet pressure, and measured hold-up time (tM). Ideal for capillary GC optimization and carrier gas tuning.
GC Linear Velocity Calculator Interface
Reference Formula
\[ v = \frac{L \times 100}{t_M \times 60} \] \[ F = \frac{v \times A}{j} \]Before You Go
Remember that this calculator assumes the column outlet is at atmospheric pressure. Accurate measurement of hold-up time (tM) is essential for reliable velocity calculation.
When optimizing methods, always compare your calculated velocity with recommended ranges for helium, hydrogen, or nitrogen to ensure proper chromatographic performance.
The article explaining how this calculator works is available at Average Linear Gas Velocity in GC: What It Means and How to Use It in Gas Chromatography Columns series.
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