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Journal Highlight: Determining degree of roasting in cocoa beans by artificial neural network (ANN) based electronic nose system and gas chromatography/mass spectrometry (GC/MS)

Date: Mar 12, 2018

Author: separationsNOW

An electronic nose system based on an array of gas sensors and GC/MS were both used in conjunction with artificial neural networks to predict the degree of roasting of cocoa beans with equal success.

Read More thumbnail image: Journal Highlight Determining degree of roasting in cocoa beans by artificial neural network ANN based electronic nose system and gas chromatographymass spectrometry GCMS

Adulterators caught over a barrel by IRMS

Date: Mar 1, 2018

Author: Ryan De Vooght-Johnson

Ageing alcoholic spirits in wooden barrels transfers flavour compounds from the wood to the spirit, but illegal flavouring with synthetic versions of these compounds can occur. Scientists from the Edmund Mach Foundation in Italy and Charles Sturt University in Australia used GC in combination with combustion and isotope-ratio mass spectrometry (IRMS) to distinguish wood-derived vanillin from synthetic vanillin.

Read More thumbnail image: Adulterators caught over a barrel by IRMS

Pregabalin problem proved by Perugia protocol

Date: Feb 15, 2018

Author: Ryan De Vooght-Johnson

The prescription pharmaceutical pregabalin seems to be increasingly abused, but data is scarce on the amount of misuse. Scientists from the University of Perugia in Italy have developed a method of testing for pregabalin use by taking hair samples, identifying the compound by GC-MS/MS.

Read More thumbnail image: Pregabalin problem proved by Perugia protocol

Journal Highlight: Volatile organic compounds associated with milk spoilage by psychrotrophic bacteria

Date: Feb 12, 2018

Author: separationsNOW

A total of 47 volatile organic compounds belonging to seven chemical groups were identified by GC/MS in spoiled milk that had been inoculated with five psychrotrophic bacterial strains.

Read More thumbnail image: Journal Highlight Volatile organic compounds associated with milk spoilage by psychrotrophic bacteria

GC-MS defeats the doping steroid cheats

Date: Feb 2, 2018

Author:

Doping with anabolic steroids remains a significant problem in many sports, particularly since identification of these compounds and many of their metabolites is hampered by their relatively short lifetimes in the body. Scientists from Ghent University in Belgium used GC-MS with chemical ionisation to detect novel long-lived metabolites from the anabolic steroids oxymesterone and mesterolone.

Read More thumbnail image: GC-MS defeats the doping steroid cheats

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
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