Analysis of Gases via Gas Chromatography: Part 3: CO and CO2

Author: Jaap de Zeeuw
Restek Corporation

Published By:  J. Sep. Sci.

Year of Publication: 2016

Abstract:

CO and CO2 are products that are present in many industrial processes. CO2 is used in many applications varying from propellants, refrigerants, preservatives, beverages, inert atmosphere, and fire extinguishers. It’s also used in oil recovery, supercritical solvent, and greenhouse analysis. Carbon dioxide is analyzed typically at higher levels (10 ppm – % level). CO is a toxic gas, but it is used mostly used as chemical precursor. Both CO and CO2 are analyzed at levels from 100 ppb to % level. Because these gases cannot be detected by FID, other detectors are required. One can also convert the CO/CO2 into methane to take advantage of FID sensitivity.

Analysis of Gases via Gas Chromatography: Part 2: Sulfur Gases

Author: Jaap de Zeeuw
Restek Corporation

Published By:  J. Sep. Sci.

Year of Publication: 2016

Abstract:

Sulfur components are widely present in many raw materials used for hydrocarbon processing. The sulfur components are undesirable because they have a strong smell, they cause acidic rain, they poison (expensive) catalysts and reduce polymer yields. Most problematic sulfur gases are hydrogen sulfide (H2S), carbonyl sulfide (COS) and methyl-ethyl mercaptans. These compounds have to be measured at ppb levels. Besides that sulfur gases are volatile, they are also are very reactive. Systems for trace sulfur analysis must be very inert from the sampling device to GC setup to measure reproducible values at ppb levels.

What’s Up with Restek at Pittcon 2016?

Restek at Pittcon 2016

 

To say Pittcon is huge would be an understatement. There’s no way you can do it all! But when you plan your days in Atlanta, be sure to write Restek onto your agenda to avoid missing out.

In addition to having a chance to talk to us in person and learn first-hand how Restek® Pure Chromatography can benefit you and your lab, we will also be running live EZGC® method translator and flow calculator demos in our booth. And of course, you won’t want to miss Jaap de Zeeuw’s short course on GC method translation or our selection of oral presentations and posters.

Go to www.restek.com/pittcon to read abstracts for all of our presentations, to easily contact the presenters, and to access the Pittcon website for additional event details.

We look forward to sharing our latest innovations and answering any questions you may have about Restek® products and services.

www.restek.com/pittcon

Impact of GC Parameters on the Separation Part 6: Choice of Carrier Gas and Linear Velocity

Author(s): Jaap de Zeeuw
Restek Corporation

Published By: Separation Science

Year of Publication: 2015

Link:  http://www.sepscience.com/Information/Archive/All-Articles/4188-/Impact-of-GC-Parameters-on-The-Separation-Part-6–Choice-of-Carrier-Gas-and-Linear-Velocity

Abstract: In part 1–5 of this series, we focused on the selection of the column dimensions and stationary phase. We also saw that temperature has a big impact on the chromatography. The last two factors, which are somewhat related, are the choice of carrier gas and the setting of linear gas velocity.

Restek and the Shimadzu Institute Set to Collaborate on GC Basics Training

International GC Specialist Jaap de Zeeuw will be giving two educational presentations about the basics of gas chromatography at the Shimadzu Institute for Research Technologies, University of Texas at Arlington:

Learn the Basics of Gas Chromatography
and why it’s the preferred separation technique every lab uses for trace analysis

Date: Thursday, October 16, 2014

Start Time: 8:00 a.m.

Location: 700 Planetarium Place, Chemistry Physics Building (CPB), Room 303, Arlington, TX 76019

Parking: 708 S. West St. (next to CPB), Arlington, TX 76019

Host: Doug Carlton, Jr., Ph.D.

Presenter: Jaap de Zeeuw, Restek Corporation

Topics:

Introduction and Principles of Gas Chromatography: Understanding the relevance of GC and the impact of the most important column parameters on separation

Optimize the GC for the Analysis of Traces in Environmental Arena: Practical tips to recognize key contributors affecting sensitivity

Keith Irwin, Restek’s Texas and Louisiana territory manager, will also be on-hand. In addition to gaining invaluable training from one of the industry’s experts, attendees can meet Keith face-to-face, arrange a site visit, or further discuss how Restek can help you solve your analytical challenges.

Restek is excited to collaborate with Shimadzu, the University of Texas, and their new educational institution. We encourage our customers, colleagues, and partners in Texas and beyond to attend.

Separation Science Asia 2014 to Feature Restek Talks on Carrier Gas Choice and GC Injection Techniques

Jaap de Zeeuw

Jaap de Zeeuw

Separation Science Asia 2014 takes place in Biopolis, Singapore, on November 19 and 20. This year’s scientific program features a new format that will focus on comprehensive, tutorial-style presentations covering a combination of best practices, troubleshooting, and method development. Joining a select group of chromatography and mass spectrometry experts invited to speak, Restek’s International GC Specialist Jaap de Zeeuw will offer two presentations:

Considerations for Choosing a Different Carrier Gas in Gas Chromatography

Jaap de Zeeuw (presenter)
Restek Corporation

Abstract: Traditionally, the carrier gas used in GC is helium. There are, however, increased drivers to choose a different carrier gas. This can be nitrogen or hydrogen. Especially in the last few years, there has been a lot of discussion to use different carrier gases because of the delivery issues for helium.

For many applications, one can use nitrogen, but there is an impact on the chromatography. Hydrogen is also a good alternative, as it also allows much shorter run times. There are practical issues to consider in changing carrier gas. In this presentation, an overview of opportunities will be presented as well as the practical concerns that have to be dealt with. Changing carrier gas is one thing, but we do prefer the same separations (peak elution order). For this we need to understand the impact, so the right actions can be taken. That means that changing carrier gas must also followed by a change of analytical conditions, meaning not only the pressure and split/splitless settings, but also the oven temperature program.

Changing to nitrogen is possible, but it also has some serious implications that need to be considered.

GC Injection Techniques for Trace Analysis

Jaap de Zeeuw (presenter)
Restek Corporation

Abstract: In gas chromatography, 90% of the trouble we experience is related to the injection technique and the conditions used. If sample transfer is not optimized, the results will not be reliable. The goal is to understand the injection process and how to obtain a narrow injection band.

In this talk, the basics of the most popular injection techniques that are used in gas chromatography for trace analysis, like split, splitless, and large volume injection, will be discussed. Also, the selection of liners, retention gaps, and columns will be addressed so one can understand why and how they are used. All techniques will be explained using practical examples.

Restek is a proud sponsor of Separation Science Asia 2014, and our chromatography experts will be on hand to discuss our latest industry-leading GC and LC solutions. If you make the trip to Singapore, be sure to stop by the Restek booth to learn how we can solve your analytical challenges.

To view the schedule of Separation Science Asia 2014 talks and to register, visit http://www.sepscience.com/Information/Events/Conferences/Separation-Science-2014 today.