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GC defeats AICAR sports cheats

Date: Dec 14, 2017

Author: Ryan De Vooght-Johnson

AICAR is a substance that occurs naturally in the body, but can also be used as a performance-enhancing drug in sports. Scientists from the French Anti-Doping Agency in Paris have developed an improved method for distinguishing natural AICAR from that derived from doping using GC-C-IRMS (gas chromatography, combustion, isotope ratio mass spectrometry).

Read More thumbnail image: GC defeats AICAR sports cheats

Journal Highlight: Determination of cyclic volatile methylsiloxanes in personal care products by gas chromatography

Date: Dec 11, 2017

Author: separationsNOW

A simple GC-FID method has been developed to enable accurate measurement of low levels of octamethylcyclotetrasiloxane (D4) and decamethylcyclotetrasiloxane (D5) in personal care products.

Read More thumbnail image: Journal Highlight Determination of cyclic volatile methylsiloxanes in personal care products by gas chromatography

Stone-age sediments’ secrets seen by GC-MS

Date: Dec 1, 2017

Author: Ryan De Vooght-Johnson

Information on prehistoric societies can be obtained by examining biomarker compounds, such as lipids, from sediment layers. Researchers from the University of the Basque Country, Vitoria-Gasteiz, examined sediments from ancient manure heaps, extracting lipids that were then assayed by GC-MS, giving information on prehistoric livestock use.

Read More thumbnail image: Stone-age sediments secrets seen by GC-MS

Metabolites from NVP sorted out by correct GC

Date: Nov 15, 2017

Author: Ryan De Vooght-Johnson

1-Vinyl-2-pyrrolidone, or NVP, and its polymers are used for a wide variety of applications, but there are some concerns about the compound’s long-term toxicity. Scientists from RWTH Aachen University used GC-MS/MS to determine the levels of metabolites of 1-vinyl-2-pyrrolidone, using spiked human urine and urine from rats exposed to the compound.

Read More thumbnail image: Metabolites from NVP sorted out by correct GC

Journal Highlight: Quantification of six potential unspecific human biomarkers of 1-vinyl-2-pyrrolidone exposure in Sprague-Dawley rat urine using gas chromatography coupled with triple mass spectrometry

Date: Nov 10, 2017

Author: separationsNOW

A sensitive electron ionization GC/MS/MS method has been established and validated for the determination of six possible biomarkers of the common industrial solvent 1-vinyl-2-pyrrolidine in urine.

Read More thumbnail image: Journal Highlight Quantification of six potential unspecific human biomarkers of 1-vinyl-2-pyrrolidone exposure in Sprague-Dawley rat urine using gas chromatography coupled with triple mass spectrometry

Fungicide residue concentration found by GC evaluation

Date: Nov 8, 2017

Author: Ryan De Vooght-Johnson

Grapes tend to suffer from a number of fungal diseases, so are often treated with fungicides, which can leave behind potentially harmful residues. Scientists from Guizhou University in China have developed a new GC-MS/MS method that can simultaneously assay the residues of two fungicides, boscalid and fludioxonil, in grapes and soil.

Read More thumbnail image: Fungicide residue concentration found by GC evaluation

Journal Highlight: GC-MS metabolomics-based approach for the identification of a potential VOC-biomarker panel in the urine of renal cell carcinoma patients

Date: Oct 16, 2017

Author: separationsNOW

The urinary volatile metabolic profile of patients with renal cell carcinoma was studied by GC/MS to identify a potential specific volatile pattern as a non-invasive strategy to detect the disease.

Read More thumbnail image: Journal Highlight GC-MS metabolomics-based approach for the identification of a potential VOC-biomarker panel in the urine of renal cell carcinoma patients

Hydrogen helps hurry harmful dioxins through GC

Date: Oct 15, 2017

Author: Ryan De Vooght-Johnson

Polychlorodibenzo-p-dioxins (PCDDs) and the related polychlorodibenzofurans (PCDFs) are toxic, persistent organic pollutants, but the current official separation methods for the various congeners are lengthy. Scientists from the Institute of Atmospheric Pollution Research in Rome developed a new GC-MS/MS method using hydrogen as the carrier gas rather than helium.

Read More thumbnail image: Hydrogen helps hurry harmful dioxins through GC

Opioids assayed by GC after extraction by SPE

Date: Oct 1, 2017

Author: Ryan De Vooght-Johnson

Opioid pharmaceuticals can have serious side-effects, such as irregular heart rhythms, so it is necessary to be able to measure their concentrations in the blood. Scientists from the University of Buenos Aires used solid-phase extraction, together with GC-MS with selected ion monitoring (SIM), to measure the levels of three synthetic opioids and two of their metabolites.

Read More thumbnail image: Opioids assayed by GC after extraction by SPE

Mosquito killer quantification achieved with negative chemical ionisation

Date: Sep 18, 2017

Author: Ryan De Vooght-Johnson

Transfluthrin is a synthetic pyrethroid insecticide, commonly used in indoor settings to control a variety of pests, but there is some concern about its possible toxicological effects. Scientists from the University of Georgia have developed a novel method of determining transfluthrin levels in rat plasma and brain tissue using GC-MS with negative chemical ionisation.

Read More thumbnail image: Mosquito killer quantification achieved with negative chemical ionisation
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