54th Annual North American Chemical Residue Workshop


Restek Technical Presentations

Vendor Seminar—Sunday, July 23, 6:15–7:15 p.m.
Soft Solutions to Hard Problems: Saving Time and Money in the Laboratory with the EZGC Web Tools

Jonathan Keim (presenter), Chris Rattray, Chris English
Restek Corporation
For more information, e-mail Jonathan Keim.
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Analytical laboratories face continual pressure to increase productivity while decreasing costs. With recent advances in available technology, we can find valuable opportunities to save time and money by focusing on optimizing analytical methods and key instrument parameters. In this talk, we will share work showing how the EZGC suite of online tools can be used to improve gas chromatographic analyses. We will show several examples of how the free software can be used for method development. Additionally, these online tools can be used to improve methods in various ways, such as maintaining high-quality separations with much shorter columns, optimizing your splitless valve time, and switching carrier gases.

Poster—Analysis of 648 Pesticides in Foods by LC-MS/MS Utilizing the Raptor Biphenyl Column
Joseph D. Konschnik1 (presenter), David R. Baker2, Neil Loftus2, Laëtitia Fages3, Eric Capodanno3
1Restek Corporation, Bellefonte, PA, U.S.; 2Shimadzu Corporation, Milton Keynes, UK; 3Phytocontrol, Nimes, France
For more information, e-mail Joe Konschnik.
Download a PDF of the full presentation.
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There are more than 1,000 pesticides used globally on soil and crops. With the ever-increasing international trade within the food industry, regulatory bodies around the world have increased the number of regulated pesticides and the maximum residue levels (MRLs) allowed in food commodities. National pesticide monitoring programs create new challenges for food safety laboratories as the number of pesticides required for analysis is increasing together with an expanded range of food products. In this poster we present the development of an LC-MS/MS method using a Raptor Biphenyl LC column for screening and quantifying over 648 pesticides in a single analysis. To evaluate the method, QuEChERS extracts of mint, tomato, and apple were provided by a commercial laboratory as raw acetonitrile extracts and spiked with 648 pesticides prior to analysis. The method was evaluated in matrix to ensure that the reporting limits were in agreement with recognized MRLs.

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