Ambient Air Sampling with Whole-Air, In-Field Concentration and Particulate Matter (PM) Methodologies (Chapter 4 in Monitoring of Air Pollutants: Sampling, Sample Preparation and Analytical Techniques)

Author(s): Jason S. Herrington
Restek Corporation

Published By: Elsevier

Year of Publication: 2015


Abstract: In his chapter of the newly published book, Monitoring of Air Pollutants: Sampling, Sample Preparation and Analytical Techniques (ed. P. Forbes), author Jason Herrington discusses the numerous ambient air sampling methods that are available and provides guidance in determining which technique is the best approach for a given scenario. This chapter provides a practical overview of whole-air, in-field concentration and particulate matter (PM) methods using sampling bags, canisters, impingers/bubblers, solid sorbents (coated and uncoated), and PM fractionators. After reading this chapter, technicians should be able to determine which method best suits their application, as well as understand proper sampling, sample preparation, and sample storage procedures. In addition, readers will become familiar with the advantages and limitations of different methodologies.

“The Big Pain”: Development of Pain-Free Methods for Analyzing 231 Multiclass Drugs and Metabolites by LC-MS/MS

Author(s): Sharon Lupo
Restek Corporation

Published By: Restek Corporation

Year of Publication: 2015


Abstract: As the demand for testing of pain management drugs increases, many laboratories are turning to LC-MS/MS for its increased speed, sensitivity, and specificity. The methods shown here use a Raptor™ Biphenyl column because it provides fast, accurate analysis of 231 drugs and drug metabolites.

New Raptor™ FluoroPhenyl Phase: the Power of HILIC and RP Modes in One LC Column

Raptor_Fluorophenyl_Skroup_CRM-(2)Restek has now extended the speed and reliability of Raptor™ column technology into the HILIC realm with the addition of Raptor™ FluoroPhenyl columns. Restek’s Raptor™ FluoroPhenyl phase offers chromatographers the ability to run in reversed-phase or HILIC mode for a variety of compounds. The Restek® Raptor™ FluoroPhenyl column is also amenable to LC-MS because it is extremely reliable and efficient with acidic mobile phases.

Restek chemists became the first to combine the speed of superficially porous particles (also known as SPP or “core-shell” particles) with the resolution of highly selective USLC® technology. This new breed of chromatographic column allows you to more easily achieve peak separation and faster analysis times without expensive UHPLC instrumentation. Learn more about Raptor™ LC columns at

Switch to a Raptor™ FluoroPhenyl LC column for reliable performance in both reversed phase and HILIC modes.


Split Injection GC: The Benefits of “Shoot-and-Dilute” GC

Author(s): Jack Cochran
Restek Corporation

Published By: LCGC’s The Column

Issue: Volume 11, Issue 21

Year of Publication: 2015


For the full issue, visit

Abstract: Jack Cochran’s new column “Practical GC” aims to provide readers with practical advice and new experimental evidence for how to get the best results from their gas chromatography (GC) systems. The first article in a series on split injection GC focuses on the advantages of using “shoot-and-dilute” GC.

Restek to Offer Twitter Lunch&Learn Chat on GC Inlet Troubleshooting

#AskRestekOn Thursday, December 17, Restek will kick off its inaugural Lunch&Learn event on Twitter! This free, hour-long chat forum will start at 12:00 p.m. noon, EST, and will focus on GC inlet troubleshooting, with an emphasis on the issues caused by temperature variations within and between inlets. Whether Restek customers or not, analysts are encouraged to follow the chat and join in with their own questions.

Panelists will include:

Jonathan "Munch" Keim and Scott GrossmanScott Grossman (@ILoveGCLiners), Restek QC Supervisor and author of the article “It’s A Matter of Degrees, but Do Degrees Really Matter? An Observation of GC Inlet Temperature Profile and Inlet-to-Inlet Temperature Variability.

Jonathan “Munch” Keim (@MunchAtRestek), Restek’s Education Coordinator and former Technical Service Manager.

To stay informed leading up to the chat, follow @Restek, @ILoveGCLiners, and @MunchAtRestek on Twitter.

At 12:00 p.m. noon, on Thursday, December 17, follow along by simply visiting and clicking All Tweets (app) or Live (browser). Periodically refresh your browser or Twitter feed to catch the latest posts.

To join in the conversation, simply tweet a question or comment and be sure to include #AskRestek

For additional help using Twitter, you can also go to

#AskRestek is your direct line to Restek’s chromatography experts on Twitter. Follow Restek on Twitter now for this event and more valuable chromatography information:

New Roc HPLC Columns from Restek: The Reliable Cornerstone for Your LC Lab

Roc™ HPLC ColumnsSolid, reliable Roc HPLC columns are pressure rated for any 400 bar HPLC system and deliver the peak shape, reproducibility, ruggedness, and performance you demand for all of your conventional HPLC applications. An exceptional value for routine analyses and large-volume workflows, Roc columns are made from high-purity silica backed by quality manufacturing and are available in a variety of phases. And newly designed minimal packaging offers compact storage with serial #-specific certificates of analysis available for download at

These rugged new columns are built to give you dependable data for a wide range of everyday methods. Roc HPLC columns are available with C18, C8, Phenyl-Hexyl, Cyano, and bare silica phases on either 3 or 5 μm fully porous spherical particles. Choose 3.0 or 4.6 mm ID in 100, 150, or 250 mm lengths for coverage of 98% of USP methods.

Get more of what you want, and less of what you don’t, with Roc LC columns from Restek.

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