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Journal Highlight: Molecular identification of Asian lacquers from different trees using Py‐GC/MS and ToF‐SIMS

Date: Jul 16, 2018

Author: separationsNOW

Pyrolysis-GC/MS and ToF-SIMS have been used to characterise lacquers from the Asian trees Toxicodendron vernicifluum from China, Japan, and Korea, Toxicodendron succedaneum from Vietnam and Gluta usitata from Myanmar.

Read More thumbnail image: Journal Highlight Molecular identification of Asian lacquers from different trees using PyGCMS and ToFSIMS

Beer’s volatile fraction caught by microextraction

Date: Jul 11, 2018

Author: Ryan De Vooght-Johnson

The various volatile compounds in beer are important for determining its flavour so accurate analytical methods for their quantification are essential. Researchers from the University of Chemistry and Technology, Prague, used solid-phase microextraction (SPME) and GC-MS to detect volatile beer compounds, optimising t he extraction using a central composite experimental design.

Read More thumbnail image: Beers volatile fraction caught by microextraction

Journal Highlight: Evaluation of coal‐related model compounds using a tandem mass spectrometry

Date: Jun 18, 2018

Author: separationsNOW

A tandem mass spectrometric technique using GC/Q‐TOFMS has been established for the selection of precursor ion/product ion pairs for monitoring coal conversion products.

Read More thumbnail image: Journal Highlight Evaluation of coalrelated model compounds using a tandem mass spectrometry

Headspace GC and TCD give water absorption capacity

Date: Jun 15, 2018

Author: Ryan De Vooght-Johnson

The water absorption capacity of flour is an important characteristic that is normally measured by filtration techniques, which can be awkward to use. Scientists from the South China University of Technology (Guangzhou, China) and the Health Supervision Bureau of Liaoning Province (Shenyang, China) developed a novel method of determining the water absorption capacity of wheat flour using headspace GC technology and a thermal conductivity detector (TCD).

Read More thumbnail image: Headspace GC and TCD give water absorption capacity

Picogram performance possible with plasma ionisation

Date: Jun 15, 2018

Author: Ryan De Vooght-Johnson

Semifluorinated alkanes are used in eye treatments and also as a component of ski wax, the latter use giving rise to concern about possible pollution. Researchers from the University of Münster and the Leibniz Institute for Analytical Sciences, Dortmund (both in Germany) used GC-MS with dielectric barrier discharge ionisation (DBDI), an atmospheric pressure plasma method, to detect a range of semifluorinated alkanes at low levels.

Read More thumbnail image: Picogram performance possible with plasma ionisation

Journal Highlight: Prediction of designer drugs: Synthesis and spectroscopic analysis of synthetic cathinone analogs that may appear on the Swedish drug market

Date: May 14, 2018

Author: separationsNOW

Six new synthetic cathinones that have not yet appeared in any Swedish drug seizures have been synthesized and used with 42 known cathinones to show that a combination of GC/MS and GC-FTIR is required for successful differentiation.

Read More thumbnail image: Journal Highlight Prediction of designer drugs Synthesis and spectroscopic analysis of synthetic cathinone analogs that may appear on the Swedish drug market

GC on waste streams gives ‘speed’ reaction schemes

Date: May 7, 2018

Author: Ryan De Vooght-Johnson

Waste solutions from illicit amphetamine production need to be analysed, both in order to provide useful intelligence for enforcement agencies, and also because they are a potential environmental hazard. A team of scientists from Germany (University of Rostock and the Federal Criminal Police Office, Wiesbaden) and the Netherlands (Netherlands Forensic Institute, The Hague) used solid-phase extraction and GC to examine the compounds in waste solutions produced by different variations of the Leuckart route...

Read More thumbnail image: GC on waste streams gives speed reaction schemes

NIST spectral library matching was poor, puzzling Livermore

Date: May 3, 2018

Author: Ryan De Vooght-Johnson

The NIST library is routinely used for identifying compounds from their mass spectra, but occasionally the matches between experimental and library data are poor. Researchers from the Lawrence Livermore National Laboratory (Livermore, California) found that an impurity in a sample of a chemical incapacitating agent gave a mass spectrum that differed significantly from that in the NIST library.

Read More thumbnail image: NIST spectral library matching was poor puzzling Livermore

The force of Orbitrap can thwart doping from the dark side of sport

Date: May 2, 2018

Author: Ryan De Vooght-Johnson

The use of anabolic steroids by athletes for doping purposes remains a serious problem, but existing analytical methods tend to give poor detection of some steroids, particularly novel ‘designer steroids’, which are often not found in databases. Researchers from the Federal University of Rio de Janeiro and Thermo Fisher (Austin, Texas) devised a new method using GC and an Orbitrap mass spectrometer to detect both known and novel anabolic steroids, along with other doping compounds.

Read More thumbnail image: The force of Orbitrap can thwart doping from the dark side of sport

Journal Highlight: Simultaneous determination of glycol ethers and their acetates in cosmetics by GC–MS

Date: Apr 16, 2018

Author: separationsNOW

A GC/MS method has been developed for the simultaneous determination of ten kinds of toxic glycol ethers and their acetates in cosmetics, with method validation from different laboratories.

Read More thumbnail image: Journal Highlight Simultaneous determination of glycol ethers and their acetates in cosmetics by GCMS
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