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LC-LTQ-Orbitrap sweetly detects antimicrobial residues in honey

Date: Jul 14, 2017

Author: Ryan De Vooght-Johnson

Various antimicrobial compounds can be used in beekeeping, but careful measurement of any residues of these agents in honey is necessary. Scientists from the Laboratory for the Analysis of Organic Compounds in Beirut and the French Agency for the Safety of Food, Environment and Occupational Health in Fougères (Brittany) described the upgrading of a validated LC-MS/MS method for residue determination to a new LC-Linear Ion Trap/Orbitrap method.

Read More thumbnail image: LC-LTQ-Orbitrap sweetly detects antimicrobial residues in honey

Synthetic Psychoactive Substances Sorted by LC-MS

Date: Jul 1, 2017

Author: Ryan De Vooght-Johnson

Large numbers of new psychoactive substances (NPS) are produced and sold on the internet every year, providing a challenge for law enforcement agencies. Scientists from the Karolinska Institute and the Karolinska University Laboratory (both in Stockholm) have developed a liquid chromatography-high resolution mass spectrometry method (LC-HRMS) to detect a wide range of such substances, together with legal psychoactive pharmaceuticals and naturally occurring alkaloids.

Read More thumbnail image: Synthetic Psychoactive Substances Sorted by LC-MS

Answering Life's Questions with Spectroscopy

Date: Jun 28, 2017

Author: Jon Evans

Spectroscopy has been a common analytical technique in laboratories for many years. Recently, however, it has begun to emerge from the laboratory, both figuratively and literally, as more and more researchers discover that it is ideally placed to answer the questions they want to ask.

Read More thumbnail image: Answering Lifes Questions with Spectroscopy

Journal Highlight: Quantitative method for analysis of tobacco-specific N-nitrosamines in mainstream cigarette smoke by using heart-cutting 2D LC with tandem MS

Date: Jun 19, 2017

Author: separationsNOW

A heart-cutting 2D-LC/MS/MS method developed for the analysis of tobacco-specific N-nitrosamines at low concentrations in Virginia-type cigarette smoke produced almost no matrix interference compared with traditional methodologies.

Read More thumbnail image: Journal Highlight Quantitative method for analysis of tobacco-specific N-nitrosamines in mainstream cigarette smoke by using heart-cutting 2D LC with tandem MS

LC on a nano-scale measures steroids in the whale

Date: Jun 15, 2017

Author: Ryan De Vooght-Johnson

Measurements of the levels of steroid hormones in live whales is crucial to understanding their health and breeding capacity. Researchers from Texas Tech University and the University of Alaska Fairbanks have devised a novel nano-LC-MS/MS method of steroid analysis that requires smaller blubber samples than existing techniques.

Read More thumbnail image: LC on a nano-scale measures steroids in the whale

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
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