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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

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

Accurate antibiotic analysis achieved with dried blood spots

Date: May 15, 2017

Author: Ryan De Vooght-Johnson

Hospital-acquired pneumonia is a common and dangerous infection, usually treated with a combination of antibiotics. Researchers from the University of Chieta-Pescara in Italy have developed a novel method of determining the levels of the antibiotics linezolid and ciprofloxacin in patients using dried blood spots and HPLC.

Read More thumbnail image: Accurate antibiotic analysis achieved with dried blood spots

Steroids in transsexual eels sorted by LC-MS/MS and DMS

Date: May 1, 2017

Author: Ryan De Vooght-Johnson

Commercially farmed young eels tend to develop into males, rather than the heavier females, but this process can be altered by feeding them with female hormones. Scientists from Dalhousie University in Halifax, Canada, and local aquaculture firm NovaEel used LC-MS/MS in conjunction with differential ion mobility spectrometry to examine female hormone levels in farmed American eels, confirming that the levels dropped down to normal 5 days after treatment.

Read More thumbnail image: Steroids in transsexual eels sorted by LC-MSMS and DMS

Journal Highlight: Monitoring of freshwater toxins in European environmental waters by using novel multi-detection methods

Date: Apr 24, 2017

Author: separationsNOW

In the context of the European project μAqua, UPLC/MS/MS and flow cytometry were used to confirm the presence and wide distribution of dihydro derivatives of anatoxin-a toxins in European freshwaters.

Read More thumbnail image: Journal Highlight Monitoring of freshwater toxins in European environmental waters by using novel multi-detection methods

Journal Highlight: Molecularly imprinted core-shell magnetic nanoparticles for selective extraction of triazines in soils

Date: Apr 24, 2017

Author: separationsNOW

Spanish scientists have synthesized a propazine-imprinted polymer on the surface of modified magnetic nanoparticles for use in the solid-phase extraction of triazine pesticides from soil samples prior to analysis by HPLC.

Read More thumbnail image: Journal Highlight Molecularly imprinted core-shell magnetic nanoparticles for selective extraction of triazines in soils

Hot Pepper Compounds Caught by Cool Coulometric Detection

Date: Apr 17, 2017

Author: Ryan De Vooght-Johnson

Whether you love it or loathe it, you may well want to know how much of that hot pepper taste is in the food you buy. Scientists from Brussels, Tokyo and Osaka have developed a novel HPLC method using coulometric detection to quantify capsaicinoids, the compounds that give the hot sensation.

Read More thumbnail image: Hot Pepper Compounds Caught by Cool Coulometric Detection

Chemists carefully compare chromatography with immunoassay for VPA

Date: Apr 2, 2017

Author: Ryan De Vooght-Johnson

Valproic acid is an anti-convulsant medication taken by epileptic patients; its plasma concentrations have to be monitored in order to minimise side effects. Researchers from the Second Military Medical University in Shanghai compared the effectiveness of using either LC-MS/MS or an immunoassay technique for these measurements.

Read More thumbnail image: Chemists carefully compare chromatography with immunoassay for VPA

Journal Highlight: Caviar versus brill eggs: A novel high performance liquid chromatography-mass spectrometry application for evaluating cosmetic ingredients composition

Date: Mar 27, 2017

Author: separationsNOW

The lipids in sturgeon and brill roe, which are used as lipid sources in beauty creams, have been analyzed and compared using GC/MS for fatty acids and HPLC coupled with high resolution MS for triacylglycerols.

Read More thumbnail image: Journal Highlight Caviar versus brill eggs A novel high performance liquid chromatography-mass spectrometry application for evaluating cosmetic ingredients composition

Brain painkiller reaction rates revealed in real-time

Date: Mar 15, 2017

Author: Ryan De Vooght-Johnson

The pharmacokinetics of the commonly-used synthetic opioid painkiller tramadol are of great interest, but most work to date has focused on the levels in plasma, rather than in the brain. In order to obtain information on the kinetics of tramadol and its main metabolite, O-desmethyltramadol, in rat brains, researchers from Wuhan University used a procedure involving microdialysis of cerebral fluid, followed by LC-MS/MS.

Read More thumbnail image: Brain painkiller reaction rates revealed in real-time
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