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Liquid–liquid microextraction leads to GC satisfaction

Date: Jan 16, 2018

Author: Ryan De Vooght-Johnson

Phthalate esters are widespread environmental contaminants and there is concern about their possible health effects so accurate methods to measure their plasma concentrations are needed. Scientists from Iran have used dispersive liquid–liquid microextraction (DLLME) and GC-MS to measure the levels of four common phthalates.

Read More thumbnail image: Liquidliquid microextraction leads to GC satisfaction

Journal Highlight: Inter- and intraspecific variability of nitrogenated compounds in gorgonian corals via application of a fast one-step analytical protocol

Date: Jan 15, 2018

Author: separationsNOW

The chemodiversity of gorgonian alkaloids was investigated by applying a fast and effective protocol combining extraction and derivatization using small-scale tissue samples and GC/MS analysis.

Read More thumbnail image: Journal Highlight Inter- and intraspecific variability of nitrogenated compounds in gorgonian corals via application of a fast one-step analytical protocol

Tobacco cheats caught by smoking gun of VOCs

Date: Jan 1, 2018

Author: Ryan De Vooght-Johnson

There is a need to be able to distinguish smokers from non-smokers by testing chemicals in their breath, but it is hard to find appropriate marker compounds. Scientists from the Institute of Microelectronics and Microsystems in Italy, have developed a new method of examining the volatile organic compounds (VOCs) in smokers’ breath using GC-MS and statistical tests.

Read More thumbnail image: Tobacco cheats caught by smoking gun of VOCs

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
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