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GC-MS – Multimedia

Determination of Volatile Organic Compounds in Water by GC-MS after Headspace-Solid-Phase Microextraction (HS-SPME) content piece image
Poster

Determination of Volatile Organic Compounds in Water by GC-MS after Headspace-Solid-Phase Microextraction (HS-SPME)

The German standard DIN 38 407-41 describes a method for the analysis of volatile compounds from aqueous samples by headspace-solid-phase microextraction (HS-SPME).
Optimization of a Vacuum Ultraviolet Photoionization source for Gas Chromatography used with a High Resolution Time of Flight Mass Spectrometer content piece image
Poster

Optimization of a Vacuum Ultraviolet Photoionization source for GC used with a High Resolution TOFMS

-Tune solution allows optimization of ion source parameters for
both proton transfer and direct ionization
-Independent ionization processes exist for M+ and MH+
-Optimizing for dopant signal intensity yields inferior results
-Degree of fragmentation remains relatively constant over a
range of source conditions
Analysis of Organic Marker Compounds and Hazardous Organic Compounds by GC/MS to Identify Contamination, Counterfeiting and Adulteration of Spices content piece image
Poster

The Use of GC/MS to Identify Contamination, Counterfeiting and Adulteration of Spices

Our previous study of spices was designed to evaluate the metal content in the spices for evidence of contamination by heavy metals or for adulteration and counterfeiting by notable concentrations of wear or additive metals. This study targeted the same spice samples to quantify the characteristic primary and secondary market compounds for each spice group.
A Novel Benchtop Time-of-Flight GC-MS System for High Performance Analysis of Human Urine content piece image
Poster

A Novel Benchtop Time-of-Flight GC-MS System for High Performance Analysis of Human Urine

A workflow was developed and implemented for the effective comparison of urine. It involved the preparation of stable compounds through derivatization, data acquisition using a high performance benchtop TOFMS, comprehensive data processing (NonTarget Deconvolution™), and quick retrospective analysis of rich datasets using Target Analyte Finding.
Accurate Mass Spectral Database: Harnessing the Power of High Performance Mass Spectrometry at Long Last content piece image
Poster

Accurate Mass Spectral Database: Harnessing the Power of High Performance Mass Spectrometry at Long Last

Standard mixtures comprising of alkanes, PAHs, semivolatiles, and pesticides were analyzed using a high resolution time-of-flight (HRTOF) mass spectrometer—Pegasus GC-HRT (LECO Corporation, Saint Joseph,MI)—at 10 spectra-per-second (m/z40–300) in high resolution mode (25,000 at FWHH). The resulting chromatographic peaks were automatically found, deconvoluted, and curated into an Accurate Mass Library (AML).
Determination of C2-C12 Aldehydes in Water by SPME Arrow On-Fiber Derivatization and GC/MS content piece image
Poster

Determination of C2-C12 Aldehydes in Water by SPME Arrow On-Fiber Derivatization and GC/MS

A method applying SPME Arrow extraction and on-fiber derivatization for the quantitation of C2-C12 aldehydes in water by GC/MS is described.
A KNIME Pipeline for the Analysis of GC-MS Data in Metabolomics content piece image
Poster

A KNIME Pipeline for the Analysis of GC-MS Data in Metabolomics

A KNIME pipeline was developed to perform pre-processing of GC-MS data in an automated way and applied to a Inflammatory bowel diseases case study
A Comparison of ITEX Dynamic Headspace–GC/MS to other Enrichment Techniques for Analysis of Flavoring Compounds content piece image
Poster

A Comparison of ITEX Dynamic Headspace–GC/MS to other Enrichment Techniques for Analysis of Flavoring Compounds

Enrichment techniques are commonly used for the analysis of flavoring compounds in different matrices with GC/MS. Analysis of flavoring compounds is done by purge & trap, SPME or headspace, depending on requirements for sensitivity. The In-Tube Ex¬traction (ITEX) Dynamic Headspace uses a micro trap filled with an adsorbent material to efficiently extract the compounds. Here we evaluate if the ITEX can be used to effectively analyze for these compounds and reduce the analyst’s time involved.
Quantitative Analysis Of Pesticides In Quechers Extracts Using UPLC- and APGC- MS/MS  content piece image
Poster

Quantitative Analysis Of Pesticides In Quechers Extracts Using UPLC- and APGC- MS/MS

In this study, we demonstrate sensitive, accurate and repeatable results for the analysis of pesticides in QuEChERS extracts of a selection of
commodities below the regulatory limits.
Video

New Metabolomics Biomarker for Heart Failure

Metabolomics has been successfully applied to identify and validate biomarkers for congestive heart failure. Diagnosis and risk stratification of heart failure (HF) is challenging.
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