Analysis of Gases via Gas Chromatography: Part 1: Nitrous Oxide

Author: Jaap de Zeeuw
Restek Corporation

Published By:  J. Sep. Sci.

Year of Publication: 2016

Link: http://www.sepscience.com/Bespoke-Products-List/4366-/Analysis-of-Gases-via-Gas-Chromatography-Part-1-Nitrous-Oxide

Abstract:

Gas chromatography (GC) is a technique that deals with gas separations. Practically the components to separate must be brought in the gaseous phase to be able to be transported by the carrier gas. In order to do that, the temperature of the sample and column can be increased. Today’s gas chromatographs can be used up to 500 °C, meaning that it is possible to analyse components with boiling points around 700 °C. The component must be thermally stable. This works fine for hydrocarbons but more polar molecules will decompose.

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

Faster (GC) Tactics: Five ways to speed up gas chromatography analyses using your current system

Author: Jaap de Zeeuw
Restek Corporation

Published By: The Analytical Scientist

Issue: 36

Year of Publication: 2016

Link: https://theanalyticalscientist.com/issues/the-new-dawn-of-precision-medicine/polishing-your-injection-technique

For the full issue, visit: https://theanalyticalscientist.com/fileadmin/tas/pdf-versions/TAS-Issue-0116.pdf

Abstract:

Reducing analysis time is a constant priority. And it’s sensible because it cuts costs per analysis and you get faster results. Here, I’d like to share some clever ways to reduce gas chromatography (GC) analysis time using existing instrumentation in two real-world situations.

Effects of Cold Temperature and Ethanol Content on VOC Emissions from Light-Duty Gasoline Vehicles

Author(s): I.J. George,1 M.D. Hays,1 J.S. Herrington,2  W. Preston,3 R. Snow,1 J. Faircloth,1 B.J. George,4 T. Long,1 and R.W. Baldauf.1

  1. Office of Research and Development, National Risk Management Research Laboratory, U.S. EPA
  2. Restek Corporation
  3. ARCADIS U.S.
  4. Office of Research and Development, National Health and Environmental Effects Research Laboratory, U.S. EPA

Published By: Environmental Science & Technology

Issue: Vol. 49, Issue 21

Year of Publication: 2015

Link: http://pubs.acs.org/doi/abs/10.1021/acs.est.5b04102 

Abstract: 

Emissions of speciated volatile organic compounds (VOCs), including mobile source air toxics (MSATs), were measured in vehicle exhaust from three light-duty spark ignition vehicles operating on summer and winter grade gasoline (E0) and ethanol blended (E10 and E85) fuels. Vehicle testing was conducted using a three-phase LA92 driving cycle in a temperature-controlled chassis dynamometer at two ambient temperatures (−7 and 24 °C). The cold start driving phase and cold ambient temperature increased VOC and MSAT emissions up to several orders of magnitude compared to emissions during other vehicle operation phases and warm ambient temperature testing, respectively. As a result, calculated ozone formation potentials (OFPs) were 7 to 21 times greater for the cold starts during cold temperature tests than comparable warm temperature tests. The use of E85 fuel generally led to substantial reductions in hydrocarbons and increases in oxygenates such as ethanol and acetaldehyde compared to E0 and E10 fuels. However, at the same ambient temperature, the VOC emissions from the E0 and E10 fuels and OFPs from all fuels were not significantly different. Cold temperature effects on cold start MSAT emissions varied by individual MSAT compound, but were consistent over a range of modern spark ignition vehicles.

 

Our MSACL 2016 U.S. Page is Now Live

Go to our MSACL 2016 U.S. page for a sneak peek at what we’ll be up to during this year’s show. You can also read abstracts for all of our posters, easily contact the presenters, and access the MSACL website for additional event details.

We’re looking forward to sharing our latest innovations for clinical mass spectrometry—and answering any questions you may have about how Restek® products and services can help you. See you there!

www.restek.com/msacl-us

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