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Journal Highlight: QSAR models for prediction of chromatographic behavior of homologous Fab variants

Date: Jun 7, 2017

Author: separationsNOW

Scientists from the US and Denmark have developed quantitative structure activity relationship models for protein separation in six chromatographic systems, including multimodal chromatography and cation-exchange chromatography.

Read More thumbnail image: Journal Highlight QSAR models for prediction of chromatographic behavior of homologous Fab variants

Journal Highlight: Determination of chlorate, perchlorate and bromate anions in water samples by microbore reversed-phase LC coupled to sonic-spray ionization MS

Date: Jun 7, 2017

Author: separationsNOW

Greek chemists have combined liquid chromatography with sonic-spray ionization mass spectrometry to analyze inorganic anions in water samples.

Read More thumbnail image: Journal Highlight Determination of chlorate perchlorate and bromate anions in water samples by microbore reversed-phase LC coupled to sonic-spray ionization MS

Journal Highlight: Essential-oil inspired synthetic libraries: synthesis, spectral and gas-chromatographic properties of new fenchyl esters

Date: Jun 5, 2017

Author: separationsNOW

The design, synthesis, and GC and NMR spectral characterization of a library of 32 endo- and exo-fenchyl esters have been described in work which will facilitate future essential oil analyses, especially those involving minor constituents.

Read More thumbnail image: Journal Highlight Essential-oil inspired synthetic libraries synthesis spectral and gas-chromatographic properties of new fenchyl esters

Gulf War Illness: Proteomics clues to affected biological pathways

Date: Jun 1, 2017

Author: Steve Down

Two complementary proteomics experiments have been carried out on the mouse model of Gulf War Illness to identify modified biological pathways in the central nervous system that might lead to targets for novel therapeutic agents.

Read More thumbnail image: Gulf War Illness Proteomics clues to affected biological pathways

Sensitising compounds caught by chemiluminescence chromatography

Date: Jun 1, 2017

Author: Ryan De Vooght-Johnson

Linalyl acetate is found in a number of essential oils, such as those of lavender and bergamot, and in many perfumery products. However, its hydroperoxides have been implicated as sensitising agents. Scientists from the fragrance company Firmenich, based at their Plainsboro New Jersey site, used HPLC combined with chemiluminescence to detect these hydroperoxides.

Read More thumbnail image: Sensitising compounds caught by chemiluminescence chromatography

Heart-cutting GC stops citrus fakery

Date: Jun 1, 2017

Author: Ryan De Vooght-Johnson

Citrus fruits and their products, such as essential oils, are found in a wide range of foods and perfumery formulations, but can be adulterated with synthetic compounds or cheaper natural extracts. Scientists from South Korea and Pakistan used heart-cutting multi-dimensional gas chromatography and mass spectrometry to determine the enantiomeric excess of various citrus compounds, measurements of which should detect adulteration.

Read More thumbnail image: Heart-cutting GC stops citrus fakery

Viagra cheats exposed by TLC

Date: Jun 1, 2017

Author: Ryan De Vooght-Johnson

Health supplements in some countries are frequently adulterated with PDE5 inhibitors, such as sildenafil (Viagra) or unapproved analogues. Researchers from Tianjin University of Science and Technology in China used a combination of TLC and Raman spectroscopy for the rapid identification of these pharmaceutical products in supplement samples.

Read More thumbnail image: Viagra cheats exposed by TLC

Journal Highlight: Evaluation of nandrolone and ractopamine in the urine of veal calves: liquid chromatography-tandem mass spectrometry approach

Date: May 22, 2017

Author: separationsNOW

Two specific liquid chromatography-tandem mass spectrometry methods have been developed for the analysis of nandrolone and ractopamine in veal calf urine, both including hydrolysis of the corresponding conjugates.

Read More thumbnail image: Journal Highlight Evaluation of nandrolone and ractopamine in the urine of veal calves liquid chromatography-tandem mass spectrometry approach

Journal Highlight: Simultaneous determination of VOCs with a wide range of polarities in urine by headspace SPME coupled to GC/MS

Date: May 22, 2017

Author: separationsNOW

Korean chemists have used a bi-polar carboxen-polydimethylsiloxane fiber to extract volatile organic compounds from urine, prior to analysis by gas chromatography/mass spectrometry.

Read More thumbnail image: Journal Highlight Simultaneous determination of VOCs with a wide range of polarities in urine by headspace SPME coupled to GCMS

Journal Highlight: HPTLC and magnetochromatography of new complexes of carboxylates with transition metals or rare earth elements and their ligands

Date: May 22, 2017

Author: separationsNOW

By combining thin-layer chromatography with a magnetic field, Polish chemists have developed a novel method for determining the lipophilicity of complexes of carboxylates with transition metals or rare earth elements.

Read More thumbnail image: Journal Highlight HPTLC and magnetochromatography of new complexes of carboxylates with transition metals or rare earth elements and their ligands
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