Versatile New Stir Bar Sorptive Extraction Techniques for Flavor, Fragrance, and Odor Analysis

Speaker: Ray Marsili, owner of Marsili Consulting Group
Title: Versatile New Stir Bar Sorptive Extraction Techniques for Flavor, Fragrance, and Odor Analysis
Abstract: The ability to use PDMS stir bars in the headspace (HSSE) and in combination with ethylene glycol-modified Silicone-coated (EG-Sil) stir bars (multi-SBSE) has increased the versatility of SBSE in recent years. Application examples for a variety of sample matrices will be presented, including beer, sweaty T-shirts for body odor chemicals, casein powder, and pretzels. Newer SBSE techniques offer low detection limits, reproducible results, linear calibration curves, and uniform enrichment of a wide range of flavor and odor compounds in many types of samples.
About the speaker: Ray Marsili is a flavor chemist and owner of Marsili Consulting Group based in Rockford, IL. Ray has over 35 years of experience in industry in R&D analytical laboratories in major food companies and as an independent consultant. Additional information on Marsili Consulting including Ray’s publication list can be found on the website (www.marsiliconsulting.com/).
About the Chicago Chromatography Discussion Group: CCDG is proud of its rich history as the first organized discussion group that focused directly on chromatography topics and issues. The mission of the CCDG is to maintain and promote an interest in and to provide an opportunity for discussion and exchange of information with respect to all fields of chromatography and related separation sciences. We accomplish this goal through a number of related strategies.
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[@NoorAli-rt1xu]

Hi, is there is any Video about stir cake sorptive extraction??? I really need to know

[@rupabhattarai650]

Hi, I wanted to know if there is any other way to extract the organic compounds (for eg. C6-C22) from the twister instead of Thermal desorption system?

[@ccdgchannel7240]

The answer is as follows: Using the GERSTEL TDU and CIS injector for thermal desorption of Twisters produces the highest recoveries of analytes from the stir bars, and the lowest detection limits and background levels. Analytes are transfered almost 100% to the GC column. Attempts by some chemists to place the Twister with extracted chemicals into the Agilent injector to desorb volatiles does not work and is a big waste of time. After back-extraction with solvents, the extracts can be injected into normal GC injectors but sensitivity and background problems are usually compromised, so this approach is inadvisable. When non-volatile or thermally labile compounds are of interest, solvent back-extraction of the Twister followed by injection into an LC system is the method of choice. This Twister back-extraction method can also be used for GC, but detection limits will be lower compared to using thermal desorption unless large volume injection techniques are used. Important advantages of GERSTEL back-extraction technology: useful for nonvolatiles and thermally labile compounds and extends capabilities to non-thermal desorption techniques and LC analysis. You can learn more about Twister back-extraction at the following link: www.richrom.com/application/v2/public/upload/0/default/70.pdf .Ray Marsili