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Gas Chromatography – Multimedia

Instant Connect Gas Sampling Valve Module Introducing a New Flexibility in Gas Sampling for GC and GCMS content piece image
Poster

Instant Connect Gas Sampling Valve Module Introducing a New Flexibility in Gas Sampling for GC and GCMS

Purpose: We present a newly developed gas sampling valve module for the Thermo Scientific™ TRACE™ 1300 Series Gas Chromatograph (GC).
Characterization of Persistent Organic Pollutants in Suspended Sediments by Thermal Desorption Coupled to GCxGC-TOFMS content piece image
Poster

Characterization of Persistent Organic Pollutants in Suspended Sediments by Thermal Desorption Coupled to GCxGC-TOFMS

Thermal desorption coupled to GC×GC-TOFMS was an effective tool for enhancing the number of compounds identifiable in suspended sediment without wet chemistry. Identified >100 additional PAHs and alkyl-PAHs than the list currently monitored.
Characterization and Quantification of Essential Oils by GC and GCxGC with TOFMS and FID content piece image
Poster

Characterization and Quantification of Essential Oils by GC and GCxGC with TOFMS and FID

Chamomile essential oils were analyzed by GC and GC×GC with both FID and TOFMS. A method was determined that reduced the analysis time from nearly two hours to just over 20 minutes without a relative increase in coelution. This was achieved by pairing a complementary secondary separation with GC×GC to a fast primary column temperature program.
The Characterization of Flavored Tobacco with GCxGC-TOFMS content piece image
Poster

The Characterization of Flavored Tobacco with GCxGC-TOFMS

The experiments described in this poster demonstrate a food, flavor, and fragrance analysis for the characterization of the aroma and flavor analytes in tobacco. Natural flavors and additives were readily determined. HS-SPME sampling pre-concentrated the volatile and semi-volatile compounds and a GCxGC-TOFMS method separated and detected components in tobacco, including known additives and naturally occurring flavor analytes.
Characterization of Food Products by GCxGC-TOFMS and GC-High Resolution TOFMS: A Food "omics" Approach content piece image
Poster

Characterization of Food Products by GCxGC-TOFMS and GC-High Resolution TOFMS: A Food "omics" Approach

This poster has demonstrated the broad applicability of GC and TOFMS in the food and beverage industry with highlighted examples from edible oils, hops, and beer. HS-SPME was used to pre-concentrate and collect volatile and semi-volatile analytes from each sample for analysis by LECO’s Pegasus 4D, HT, and/or HRT. This type of information provides food “omics” insight at various stages throughout production, including differentiation of raw materials, process changes, and finished products.
Potential Benefits of Comprehensive Two=Dimensional Gas Chromatography — High Resolution Time-of-Flight Mass Spectrometry (GCxGC-HRTOFMS) content piece image
Poster

Potential Benefits of Comprehensive Two=Dimensional Gas Chromatography — High Resolution Time-of-Flight Mass Spectrometry (GCxGC-HRTOFMS)

Preliminary results of a resarch prototype GC×GC-HRTOFMS demonstrate that more confident peak identifications can be made as compared to GC-HRTOFMS and GC×GC-TOFMS nominal mass. This was possible due to the high mass accuracy, high mass resolution, and high data acquisition rate of the mass spectrometer, and the high performance of the GC×GC system.
Crude Oil And Asphaltene Characterization by Pyrolysis Coupled to Gas Chromatography High Resolution Time-of-flight Mass Spectrometry content piece image
Poster

Crude Oil And Asphaltene Characterization by Pyrolysis Coupled to Gas Chromatography High Resolution Time-of-flight Mass Spectrometry

Py-GC-HRTOFMS analysis with high resolution and high mass accuracy is crucial for identification of crude oil and asphaltene pyrolysis products by unequivocal chemical formula assignment, with enhancement of sensitivity and selectivity. Analysis of petroleum and respective asphaltene fractions from diverse geographical origins are under evaluation as part of future work.
GC-MS Comparison of <i>Lavindin Grosso</i> Oil Obtained by Steam Distillation and SFE content piece image
Poster

GC-MS Comparison of Lavindin Grosso Oil Obtained by Steam Distillation and SFE

Oil was extracted from Lavindin Grosso using steam distillation and using supercritical fluid extraction (SFE). Multiple analyses of the same extract demonstrated repeatability of the analytical method. The variability between batches of distillate bracketed the composition obtained by SFE. The differences among the oils could be attributed more to where the lavender was grown than to the extraction method.
Isolation, Identification, and Determination of Designer Anabolic Steroids Commonly Found in Dietary Supplements content piece image
Poster

Isolation, Identification, and Determination of Designer Anabolic Steroids Commonly Found in Dietary Supplements

A general analytical approach in identifying emerging steroid-like compounds is presented, including analysis by GC-MS, LC-MS, and/or HPLC-UV. Isolation of unknown compounds was achieved by high performance liquid chromatography with fraction collection. Isolated compounds were characterized by Nuclear Magnetic Resonance spectroscopy and high resolution accurate mass-mass spectrometry to elucidate their structure.
Identification and classification of antifouling compounds secreted by anti MIC microorganisms. A metabolomic analysis. content piece image
Poster

Identification and classification of antifouling compounds secreted by anti MIC microorganisms. A metabolomic analysis.

BIOCORIN project, aims to develop a green alternative to the coatings and solutions used up to date for MIC corrosion control. Some of the results of this project are presented here, with the identification of several relevant antifouling compounds secreted by environmentally isolated anti-MIC strains of microorganisms via a metabolomic approach.
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