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Catching makers of crystal meth by chemometrics

Date: Mar 15, 2017

Author: Ryan De Vooght-Johnson

Identifying impurities in the illegal drug N-methylamphetamine, a.k.a. methamphetamine or crystal meth, can help law enforcement agencies detect the likely source and the synthetic route used. Scientists from the Chemistry and Chemical Engineering Research Centre of Iran used chemometric methods to detect trace impurities hidden under the large main peak in pure samples of seized methamphetamine.

Read More thumbnail image: Catching makers of crystal meth by chemometrics

Heavy metal from cars: Statistical analyses of spectra

Date: Mar 15, 2017

Author: David Bradley

Multivariate statistical techniques, principal component analysis (PCA), and hierarchical cluster analysis have been used to process data on metal pollutants in a densely populated city based on atomic absorption spectra.

Read More thumbnail image: Heavy metal from cars Statistical analyses of spectra

Record-breaking crystals: Smallest ever X-rayed

Date: Mar 15, 2017

Author: David Bradley

The crystalline protein envelope of an insect virus has been examined by high-intensity X-ray pulses. The study by Henry Chapman of the Center for Free-Electron Laser Science id described in the Proceedings of the National Academy of Sciences and represents the smallest protein crystals examined so far by X-ray crystallography.

Read More thumbnail image: Record-breaking crystals Smallest ever X-rayed

What a difference a state makes: NMR curiosity

Date: Mar 15, 2017

Author: David Bradley

Nuclear magnetic resonance (NMR) spectroscopy has revealed how molecular self-assembly processes can take different forms of a supramolecular structure from the solution state to the solid state and back again, a phenomenon identified for the first time by researchers at the University of Warwick, UK.

Read More thumbnail image: What a difference a state makes NMR curiosity

Journal Highlight: Analysis of soluble components in coals and interpretations for the complex mass spectra

Date: Mar 13, 2017

Author: spectroscopyNOW

Soluble products from the thermal dissolution of Chinese coals have been analyzed by LC/MS, revealing the distributions of isomers to describe the content inequality of organic species within the same class of coal molecules.

Read More thumbnail image: Journal Highlight Analysis of soluble components in coals and interpretations for the complex mass spectra

Journal Highlight: Data fusion of fluorescence and UV spectroscopies improves the detection of cocoa butter adulteration

Date: Mar 13, 2017

Author: spectroscopyNOW

Fluorescence and UV spectroscopies have been used synergistically for the detection of cocoa butter adulteration with cocoa butter equivalents, using principal component regression models.

Read More thumbnail image: Journal Highlight Data fusion of fluorescence and UV spectroscopies improves the detection of cocoa butter adulteration

Journal Highlight: Recent developments in polymer applications of synchrotron small-angle X-ray scattering

Date: Mar 13, 2017

Author: spectroscopyNOW

Recent developments in polymer applications of SAXS and its related techniques such as USAXS, ASAXS, GISAXS and X-ray photon correlation spectroscopy have been reviewed along with new trends in nanoparticle analyses and industrial applications.

Read More thumbnail image: Journal Highlight Recent developments in polymer applications of synchrotron small-angle X-ray scattering

Journal Highlight: The new face of isotopic NMR at natural abundance

Date: Mar 6, 2017

Author: spectroscopyNOW

The main concepts, definitions, applications and improvements of NMR-based isotope analysis at natural abundance have been reviewed.

Read More thumbnail image: Journal Highlight The new face of isotopic NMR at natural abundance

Journal Highlight: Local and nonlocal procurement of raw material in Amud Cave, Israel: The complex mobility of Late Middle Paleolithic groups

Date: Mar 6, 2017

Author: spectroscopyNOW

Geological and archaeological flints from two stratigraphic subunits at the Neanderthal site of Amud Cave have been linked with the geochemical characteristics obtained by ICP MS and ICP AES.

Read More thumbnail image: Journal Highlight Local and nonlocal procurement of raw material in Amud Cave Israel The complex mobility of Late Middle Paleolithic groups

Journal Highlight: Two-dimensional correlation infrared spectroscopy applied to the identification of ephedrine and pseudoephedrine in illegally adulterated slimming herbal products

Date: Mar 6, 2017

Author: spectroscopyNOW

2D Correlation IR spectroscopy has been employed as a simple and economical method for the identification of ephedrine and pseudoephedrine in illegally adulterated slimming herbal products.

Read More thumbnail image: Journal Highlight Two-dimensional correlation infrared spectroscopy applied to the identification of ephedrine and pseudoephedrine in illegally adulterated slimming herbal products
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