Baking and Conditioning Part 2 of 2
Conditioning
The idea is that a new or cleaned liner, injection port, column, CFT device, or the MS ion source have some sort of exposed something-or-other that is chemically active to at least one of the com...
Baking and Conditioning Part 1 of 2
GC and GC/MS samples come in all types, which is why the maintenance actions and frequency will vary. On GC and GC/MS systems little to no preparation to the system is needed for some sample types other than routin...
Part 1 included many questions and some answers about the maximum abundance that should be detected at the electron multiplier. Another important consideration is how much sample should go into the column.
See Which Electron Io...
Do you know about the maelstrom of molecules, atoms, ions, and electrons that are going on inside a GC/MS Electron Ionization ion source?
The molecules streaming out of the end of the column in molecular flow come out at approximately the speed of so...
An electron multiplier is a device used to multiply the signal of electrons on the mass spectrometer. The signal is sent to a digitizer, which produces the abundance seen on the computer. When an ion reaches the end of the ion beam, it is strongly attracted to a high-energy dynode (HED) which carries a strong opposite charge to the charge of the ion. For example, if the ion is positive the dynode is charged in negative…
Ferrules and connectors for GC allow end users to fully customize their instrument and flow-path to meet their unique analytical needs. Minor leaks within the sample flow path can be detrimental to instrument performance, resulting in variable retention times, elevated background noise, column bleed, tailing peaks, and inlet discrimination.
What is a “High Nitrogen” Value and How to Identify Possible Causes and Solutions
Air is 78.09 % Nitrogen and 20.95 % Oxygen or approximately a 4:1 ratio.
Nitrogen in the MS ion source significantly reduces the sensitivity. You woul...
How Does Carrier Gas Flow and Vacuum Work Together in GC/MS
A diagram of the GC Split/Splitless inlet is shown. Gas is compressible, so to change the flows and pressures in the entire inlet subsystem quickly and accurately requires enough chang...
How to Identity the Root Cause of Common GC/MS Issues
Ion Ratio/Spectral Tilt
Tune Ion Peak Shape
Chromatographic Peak Shape
Where can problems in your GC/MS System occur? How can you identify what part of the GC/MS system you should be troub...
I’m the first GCMS blogger for the Agilent Customer Community and this is article number 1. We’ll navigate through the GCMS talking about how it works and what needs to be done to keep one running smoothly. That is going to take a while, ...
Lithium-ion batteries (LIBs) have widely been applied in electronic devices due to their high energy densities, flexible design, light weight, and long lifespan compared to other types of batteries. Gas generation or the volume swelling of a battery ...
Hydrogen (H2) is the simplest and most abundant element in the universe. Since, it only occurs naturally on Earth when combined with other elements it must be produced from other sources. It can be produced without a carbon footprint from variety of ...
In this video Shannon Coleman explains the benefits of using the Agilent Scanview Chromatography Database.
Link to the Scanview Database on Agilent.com
DE44222.4756597222
In Part 2 of this three part series, Shannon Coleman discusses the tools used at Agilent to find helium leaks and the GC hardware used for conservation of helium.
DE.33125
In Part 1 of this three part series, Shannon Coleman discusses the helium shortage and how it is affecting the analytical industry, especially related to Gas Chromatography. He discusses ways to conserve helium and in this video specifically discusses how to carry out a helium audit for your organization.
In this video I will discuss how to calculate Deans Switch restrictor sizes for GC and GC/MS. The goal of this video is to give you the tools to make you successful in designing your Deans Switch analysis. Play the video a...
