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The CHROMacademy Essential Guide Webcast: Parker Balston
10 Things You Didn’t Know About Your GC

Thursday 20th October 2016,
8:00am PDT/ 11:00am EDT/ 4:00pm BST/ 5:00pm CEST


Gas chromatography (GC) is widely used in variety of application areas, yet rarely is the application or equipment properly optimized.  With nearly 70 years of use since its invention in 1947, much is known about the technique however, there is always room for everyone to sharpen their practice, so we’ve put together 10 of our favorite lesser known facts which we think will have a positive impact on your GC data.

Presented by

John V. Hinshaw (Senior Scientist, Serveron Corporation)
Dr. Dawn Watson (CHROMacademy Technical Expert, Crawford Scientific)

Topics Covered

  • Split vent trap - GC’s dirty secret
  • Why hydrogen is the best carrier gas
  • Generators vs. cylinders - who is the champion of safety?
  • The benefit of using a GC-MS designated column even when you don’t do GC-MS
  • Advantages of ultra-inert columns
  • Guard column or retention gap - what’s the difference and when to use them
  • A little bit of split can give you better peak shape
  • The wonder of gas saver mode
  • Where does your GC measure the flow out of the column?
  • How important is it to know the correct column length?


Presenter Information »


10 Things You Didn’t Know About Your GC - Tutorial

This month’s webcast focused on little known facts about GC which could have a positive impact on your methods.  The CHROMacademy material provided in this month’s tutorial will help you understand the entire GC process which will provide you with the knowledge to design the best possible GC method for your application.

Our Quick guides, CHROMacademy course content, and archived webcasts and tutorials will provide you with practical tips for correctly setting up your GC instrument, how to improve your split/splitless injection technique, how to avoid common mistakes in gas chromatography, and how to quickly select the correct column for your application. 

Watch the webcast

eLearning Modules

Gas Supply and Pressure Control

This module contains everything you need to know about suppling gas to your GC instrument - from the gases that are required, to how to make sure they are clean enough, and how to control their pressure.

Gases required for GC | Quality of Gas Supply | Gas Generators - Using Hydrogen in the Lab
Electronic Pressure Control

Sample Introduction

Make the most of your split injections by optimizing the split ratio, learning how to avoid sample discrimination, and injecting the correct volume.

Split Injection | Setting the Split Ratio | Sample Discrimination
Injection Volume | Optimising Injection Volume

GC Columns

Learn how to select the correct column for your application and install it correctly for optimum chromatographic results.

Polysiloxane Classifications | Stationary Phase Selection Summary | Column Dimensions - Length
Carrier Gas Flow Rate | Column Bleed | Column Installation & Conditioning

Quick Guides

Chromatography Practical GC Tips

Important samples?  In a hurry?  Forgotten anything? Avoid the walk of shame to tell the boss you need to repeat yesterday’s GC analysis ... because you forgot to check something really simple.  Here are 16 quick tips to avoid this situation.

Chromatography Practical GC Tips »

GC Setup Checklist

Modern GCs are simple and very reliable instruments, with virtually no moving parts. As such, problems relating to faults with the instrument are rare. As troubleshooting GC problems can be difficult, the secret to reliable performance lies in taking the time at the start to set up the instrument correctly. Whether your GC instrument has only been shut down for a couple of days or has been gathering dust in a corner for a year, follow our quick checklist to increase performance and reliability.

GC Setup Checklist »

5 Ways to Improve Your Split/Splitless Injection Technique

Some helpful hints that can be applied to achieve the best sample introduction every time.

Improve Your Split/Splitless Injection Technique »

10 Common GC Mistakes

Read this to avoid the most common GC mistakes - you’ll thank us for it later!

10 Common GC Mistakes »

Real Life GC Column Selection

The best way to choose GC columns based on analyte or sample characteristics.

Real Life GC Column Selection »

What GC Operators Need to Know. Part 1: From Gas Supply and Inlets to Column Selection and Temperature Programming

During this two part event we will look at the whole GC process from sampling, to injection, separation, and detection. We will provide practical hints and tips for the essential GC parameters in order to make your use of this powerful technique straightforward and successful. Firstly we will discuss the gases required for GC, critical choices in gas sampling and sample preparation, and how to optimize your sample injection routine. Column selection is probably one of the most important choices in any chromatographic method; therefore, we will share our insights on how to select the correct column each time. Finally, we will detail how to utilize and optimize isothermal and temperature programmed methods to produce optimum resolution.

Gas Supply and Inlets to Column Selection and Temperature Programming »

What GC Operators Need to Know. Part 2: Everything Needed to Understand Detectors, Methods, and Troubleshooting

Part II of our definitive guide to what all GC operators need to know will examine how to select the correct detector for your application as well as which parameters can and should be optimized. We will discuss what an optimum GC method looks like and how to implement a written method - including what choices need to be made in relation to the carrier gas, setting up the inlet etc. If your lab requires higher throughput then our insights into speeding up GC will be invaluable. Finally, even the best developed method and most well maintained GC instrument can develop problems; therefore, we will finish this webcast by letting you into a few secrets on how the experts troubleshoot GC problems.

Detectors, Methods, and Troubleshooting »

Developing Better GC Methods - A Blueprint

This webcast explores what constitutes the optimum GC method. We will examine the many instrument parameter settings, as well as the chemistry and temperature program considerations which can and should be optimized for every analysis. This webcast analyzes what the ideal method specification might look like and highlights the important decisions which lead to highly stable and sensitive GC methods. The webcast will draw up a blueprint for a highly useful and practically relevant optimum GC method.

Developing Better GC Methods - A Blueprint »

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Dr. Dawn Watson CHROMacademy Technical Expert
Crawford Scientific

Dawn received her PhD in synthetic inorganic chemistry from the University of Strathclyde, Glasgow.  The focus of her PhD thesis was the synthesis and application of soft scorpionate ligands.  As well as synthetic skills, this work relied on the use of a wide variety of analytical techniques, such as, NMR, mass spectrometry (MS), Raman spectroscopy, infrared spectroscopy (IR), UV-visible spectroscopy, electrochemistry, and thermogravimetric analysis.  Following her PhD she spent two years as a postdoctoral research fellow at Princeton University studying the reaction kinetics of small molecule oxidation by catalysts based on Cytochrome P450.  In order to monitor these reactions stopped-flow kinetics, NMR, HPLC, GC-MS, and LC-MS techniques were utilized.  Prior to joining the Crawford Scientific and CHROMacademy technical team she worked for Gilson providing sales and support for the entire product range including, HPLC (both analytical and preparative), solid phase extraction, automated liquid handling, mass spec, pipettes, and laboratory consumables. 

John V. Hinshaw
(Senior Scientist,
Serveron Corporation)

John is the GC Department Dean at CHROMacademy. He has been active in the field of chromatography for more than thirty years primarily in gas chromatography engineering and applications. He is currently Senior Scientist at Serveron Corporation where he develops on-line instrumentation. John is the longtime editor of the "GC Connections" column in LC/GC Magazine, and he actively participates in ACS, ASTM International, IEEE, IUPAC, USP, and CIGRÉ.