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Shining a light on ionic liquid photodegradation

Date: Nov 15, 2017

Author: Ryan De Vooght-Johnson

Ionic liquids have long been touted as 'green' solvents, but relatively little work has been carried out on their degradation in the environment. Researchers from the University of Turin, Italy, examined the degradation products formed by UV irradiation of aqueous solutions of the ionic liquid 1-butyl-1-methylpiperidinium tetrafluoroborate (BMPA) using HPLC and an LTQ-Orbitrap mass spectrometer.

Read More thumbnail image: Shining a light on ionic liquid photodegradation

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

Gout can make you spit: Analyzing gout-related metabolites in saliva

Date: Nov 13, 2017

Author: Jon Evans

Scientists in the US have used capillary ion chromatography and mass spectrometry to identify metabolites in saliva associated with the painful inflammatory condition known as gout.

Read More thumbnail image: Gout can make you spit Analyzing gout-related metabolites in saliva

Journal Highlight: Isolation of three triterpene saponins, including two new oleanane derivatives, from Soldanella alpina and HILIC–ELSD of these three saponins in four Soldenella species

Date: Nov 13, 2017

Author: separationsNOW

Scientists from Austria and Switzerland used hydrophilic interaction liquid chromatography with several detection techniques, including mass spectrometry, NMR and evaporative light scattering detection, to analyze saponins in the alpine snowbell.

Read More thumbnail image: Journal Highlight Isolation of three triterpene saponins including two new oleanane derivatives from Soldanella alpina and HILICELSD of these three saponins in four Soldenella species

Journal Highlight: Graphene-based molecularly imprinted polymer for separation and pre-concentration of trace polycyclic aromatic hydrocarbons in environmental water samples

Date: Nov 13, 2017

Author: separationsNOW

Scientists from South Africa and India have produced a composite of reduced graphene oxide and pyrene-imprinted polymer for the solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples.

Read More thumbnail image: Journal Highlight Graphene-based molecularly imprinted polymer for separation and pre-concentration of trace polycyclic aromatic hydrocarbons in environmental water samples

Journal Highlight: Influence of extraction pH on the foaming, emulsification, oil-binding and visco-elastic properties of marama protein

Date: Nov 13, 2017

Author: separationsNOW

Scientists in South Africa used two-dimensional gel electrophoresis to help investigate the effect of extraction pH on the properties of a protein extracted from marama beans.

Read More thumbnail image: Journal Highlight Influence of extraction pH on the foaming emulsification oil-binding and visco-elastic properties of marama protein

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: Edible mushrooms: a potential source of essential amino acids, glucans and minerals

Date: Nov 6, 2017

Author: separationsNOW

The main chemical and biochemical constituents of nine edible mushrooms have been evaluated, principal component analysis to group the mushrooms according to their amino acids, glucans and chemical composition.

Read More thumbnail image: Journal Highlight Edible mushrooms a potential source of essential amino acids glucans and minerals

Journal Highlight: Exogenous and endogenous lipids of human hair

Date: Nov 6, 2017

Author: separationsNOW

Spanish chemists used thin layer chromatography with flame ionization detection to characterize the external and internal lipids of Caucasian hair and their influence on properties such as moisture content and hydrophobic character.

Read More thumbnail image: Journal Highlight Exogenous and endogenous lipids of human hair
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