Related Experiment Video
Updated: Oct 7, 2026

Simple In-House Ultra-High Performance Capillary Column Manufacturing with the FlashPack Approach
Published on: December 4, 2021
Linear programming of inlet pressure or flow-rate in isothermal gas chromatography with near-vacuum outlet pressure
1Department of Chemistry, California State University, Chico 95929-0210, USA. tnahir@csuchico.edu
Abstract:
The equation of motion for a peak in a gas chromatography experiment is shown to be exact whenever the column outlet pressure is approximately zero. Based on steady-state assumptions, this equation is solved for an isothermal analysis with a single-ramp inlet-pressure or flow-rate program. Theoretical calculations of retention times are confirmed experimentally for two n-alkanes using a capillary column connected to a mass-selective detector. A slight but consistent discrepancy between theoretical and measured results is interpreted as a failure of the steady-state assumption when the magnitude of the rate of change of inlet pressure is large.
More Related Videos
07:49On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes
Published on: August 5, 2016
11:44Qualitative Characterization of the Aqueous Fraction from Hydrothermal Liquefaction of Algae Using 2D Gas Chromatography with Time-of-flight Mass Spectrometry
Published on: March 6, 2016
Related Concept Videos
Gas Chromatography: Sample Injection Systems
Two primary injection methods are used...
High-Performance Liquid Chromatography: Elution Process
Gas Chromatography: Introduction
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.
Gas Chromatography: Types of Columns and Stationary Phases
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
High-Performance Liquid Chromatography: Instrumentation
Types Of Column Chromatography
Gel Filtration Chromatography
When the...