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Fungicide assay by GC gives good results with ECD

Date: Apr 9, 2018

Author: Ryan De Vooght-Johnson

The fungicide dimethachlon is widely used on rice plants in China, despite its relatively high level of kidney toxicity. Scientists from the Guizhou University (Guiyang, China) developed a new GC method using electron capture detection (ECD) to detect dimethachlon residues in paddy soil, rice straw, rice husks and rice grains.

Read More thumbnail image: Fungicide assay by GC gives good results with ECD

Journal Highlight: Metabolite identification of the antimalarial naphthoquine using liquid chromatography–tandem high‐resolution mass spectrometry in combination with multiple data‐mining tools

Date: Apr 9, 2018

Author: separationsNOW

Metabolite profiling of naphthoquine has been studied in six liver microsomal incubates, seven recombinant CYP enzymes and the rat model by LC-HRMSn in conjunction with online H/D exchange and multiple data‐mining tools applied in tandem.

Read More thumbnail image: Journal Highlight Metabolite identification of the antimalarial naphthoquine using liquid chromatographytandem highresolution mass spectrometry in combination with multiple datamining tools

2D GC defeats 1D on compounds from the water flea

Date: Apr 6, 2018

Author: Ryan De Vooght-Johnson

Two-dimensional GC, where the output of one column is put through another, is a powerful technique that is being increasingly applied to complex mixtures of metabolites. Scientists from the Sharif University of Technology (Tehran) and IDAEA-CSIC (a government institute in Barcelona) compared the effectiveness of ordinary GC-MS with that of two dimensional GC plus time-of-flight MS for metabolite detection in Daphnia (water fleas), employing chemometric techniques to manipulate the data.

Read More thumbnail image: 2D GC defeats 1D on compounds from the water flea

Journal Highlight: 'One‐pot' sample processing method for proteome‐wide analysis of microbial cells and spores

Date: Apr 3, 2018

Author: separationsNOW

A simple 'one‐pot' method for the proteome analysis of bacterial spores has been demonstrated for Bacillus subtilis, Bacillus cereus and Peptoclostridium difficile, yielding to the identification of >1000 across all spore layers of the three organisms.

Read More thumbnail image: Journal Highlight Onepot sample processing method for proteomewide analysis of microbial cells and spores

Journal Highlight: Plasma metabolome analysis of patients with major depressive disorder

Date: Apr 2, 2018

Author: separationsNOW

Japanese researchers used ion chromatography to measure levels of the metabolite phosphoethanolamine in blood plasma, as a candidate biomarker of major depressive disorder.

Read More thumbnail image: Journal Highlight Plasma metabolome analysis of patients with major depressive disorder

Asthma at work: Proteomics search for biomarkers

Date: Apr 1, 2018

Author: Steve Down

Nasal protein profiling has been used to measure the responses of people exposed to airborne allergens like isocyanates and welding fumes, leading to several candidate biomarkers for work-related asthma.

Read More thumbnail image: Asthma at work Proteomics search for biomarkers

Thermal Gradient Separation optimised by simulation

Date: Apr 1, 2018

Author: Ryan De Vooght-Johnson

High-temperature thermal gradient interaction chromatography (HT-TGIC) is a method that involves putting copolymers through heated columns in order to determine their chemical composition distribution (CCD), i.e. the ratio of the different monomer units. Scientists from Bangkok and Canada used mathematical modelling to examine the effect of having multiple adsorption/desorption stages during HT-TGIC elution, so-called multiple high-temperature thermal gradient interaction chromatography (m-HT-TGIC).

Read More thumbnail image: Thermal Gradient Separation optimised by simulation

GC is fine for compounds in wine

Date: Apr 1, 2018

Author: Ryan De Vooght-Johnson

The amount of pressing that takes place during wine production can affect the wine’s chemical composition and hence its flavour. Scientists from Turkey have compared wine made from free-run liquid (i.e. unpressed) with that produced from pressed liquid, employing GC-MS and GC-olfactometry to look at flavour compounds, while LC-MS/MS was used to examine anthocyanins.

Read More thumbnail image: GC is fine for compounds in wine

Easy assay by LC is suitable for ADCs

Date: Apr 1, 2018

Author: Ryan De Vooght-Johnson

Antibody–drug conjugates (ADCs) are increasingly used in cancer treatment, but their analytical quantification can be difficult. Researchers from South Korea have developed a single-platform method for assaying such conjugates using LC-MS, applying it to the commercial drug brentuximab vedotin (Adcetris).

Read More thumbnail image: Easy assay by LC is suitable for ADCs

Journal Highlight: Enantioselective ultra high performance liquid and supercritical fluid chromatography: The race to the shortest chromatogram

Date: Mar 26, 2018

Author: separationsNOW

An overview of recent achievements in the field of ultra‐high‐resolution chromatography on columns packed with chiral stationary phases has been given, with an emphasis on very recent studies on ultrafast chiral separations.

Read More thumbnail image: Journal Highlight Enantioselective ultra high performance liquid and supercritical fluid chromatography The race to the shortest chromatogram
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