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GC-IRMS needs LC to give success

Date: Jun 18, 2019

Author: Ryan De Vooght-Johnson

Hexabromocyclododecane (HBCD) is a brominated flame retardant that is banned in various regions due to concerns about its environmental effects. Researchers from the Guangzhou Institute of Geochemistry (Chinese Academy of Sciences) used HPLC and GC-IRMS to examine the carbon isotope ratio of HBCD, which is useful for determining the sources of this compound.

Read More thumbnail image: GC-IRMS needs LC to give success

Journal Highlight: Comparative gas chromatographic/mass spectrometric characterization of di‐ and trialkyl phosphites

Date: Jun 18, 2019

Author: separationsNOW

Homologous series of alkyl esters of phosphorus‐containing acids, namely, dialkyl phosphonates and trialkyl phosphites, have been characterized by EI mass spectra and gas chromatographic retention indices on semi‐standard non‐polar stationary phases.

Read More thumbnail image: Journal Highlight Comparative gas chromatographicmass spectrometric characterization of di and trialkyl phosphites

Chemical ionisation for steroid sulfate determination

Date: Jun 4, 2019

Author: Ryan De Vooght-Johnson

Steroids are often converted to their sulfate derivatives in the body, and the detection of these compounds is useful for anti-doping testing in sport. Scientists from Ghent University, Belgium, devised a new GC-MS/MS method for detecting steroid sulfates.

Read More thumbnail image: Chemical ionisation for steroid sulfate determination

Quick chromatography characterises coconut compounds

Date: May 21, 2019

Author: Ryan De Vooght-Johnson

The complex mixtures of compounds found in bio-oil samples are often separated by two-dimensional GC (GC × GC), usually involving long run times. Scientists from three Brazilian universities (the Federal University of Rio Grande do Sul, Porto Alegre, Tiradentes University, Aracaju, and the State University of Rio de Janeiro) developed a new, quicker method for bio-oil chromatography using fast GC × GC with a cryogen-free thermal modulator, using it to examine a bio-oil produced from the pyrolysis of...

Read More thumbnail image: Quick chromatography characterises coconut compounds

Journal Highlight: Metabolic fingerprinting of chorionic villous samples in normal pregnancy and chromosomal disorders

Date: May 14, 2019

Author: separationsNOW

Metabolic changes in chorionic villi during the first trimester of pregnancy in euploid and aneuploid cases have been studied by GC/MS, HPLC and NMR, revealing that polyol pathways, myo‐inositol and oxidative stress may have fundamental roles.

Read More thumbnail image: Journal Highlight Metabolic fingerprinting of chorionic villous samples in normal pregnancy and chromosomal disorders

Wild boars, GC and pork selection – a story of MS detection

Date: May 7, 2019

Author: Ryan De Vooght-Johnson

The flavour of pork is much appreciated, but the relationship between the volatile compounds present and the breed of pig still requires further study. Researchers from Gansu Agricultural University, Lanzhou, China, used headspace solid-phase microextraction (HS-SPME) and GC-MS to examine the volatile compounds from pork meat from four breeds of pig. 

Read More thumbnail image: Wild boars GC and pork selection  a story of MS detection

Feeling supersonic: SMB analysis of petroleum fractions

Date: Apr 16, 2019

Author: Ryan De Vooght-Johnson

Oxygenation of heavy petroleum fractions can produce more valuable products, but the analysis of the resultant complex mixture is challenging owing to the many species present. Researchers from Sasol’s laboratories in Sasolburg (South Africa), the University of Pretoria and Tel Aviv University used initial purification by solid-phase extraction or supercritical fluid chromatography followed by separation by GC-MS with supersonic molecular beams to separate a mixture of oxygenated petroleum...

Read More thumbnail image: Feeling supersonic SMB analysis of petroleum fractions

Journal Highlight: An analytical method for the analysis of trihalomethanes in ambient air using solid‐phase microextraction gas chromatography‐mass spectrometry: An application to indoor swimming pool complexes

Date: Apr 16, 2019

Author: separationsNOW

A simple method for the collection and GC/MS analysis of the four brominated and chlorinated trihalomethanes in air samples has been developed and applied to indoor air from swimming pools.

Read More thumbnail image: Journal Highlight An analytical method for the analysis of trihalomethanes in ambient air using solidphase microextraction gas chromatographymass spectrometry An application to indoor swimming pool complexes

Protectant permits precise pesticide appraisal

Date: Apr 2, 2019

Author: Ryan De Vooght-Johnson

The insecticide buprofezin is widely used on vegetables, fruit and rice, but determination of the residue levels in crops can be challenging. Scientists from the Agricultural Research Centre at Giza, (Egypt) and the Food Safety Laboratory at Buraydah (Saudi Arabia) used GC-MS, along with the addition of d-sorbitol to supress matrix effects, to determine buprofezin residues in cabbage and cauliflower.

Read More thumbnail image: Protectant permits precise pesticide appraisal

Journal Highlight: Urine metabolic profiles in paediatric asthma

Date: Mar 19, 2019

Author: separationsNOW

Candidate biomarkers specific to paediatric asthma have been determined in urine by GC/MS to provide insights into asthmatic pathophysiology with the aid of network biology approaches.

Read More thumbnail image: Journal Highlight Urine metabolic profiles in paediatric asthma
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