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Biodiesel analysis: Biofuel blend by NMR spectroscopy

Date: Apr 15, 2017

Author: David Bradley

A new quantitative method of analysing the biodiesel in a diesel-biodiesel blend using proton nuclear magnetic resonance (NMR) spectroscopy has been developed by researchers in Brazil. The resulting spectra are subjected to a univariate calibration in which the integrals of the spectra are considered. Statistical comparison with infrared (IR) spectra corroborate the findings.

Read More thumbnail image: Biodiesel analysis Biofuel blend by NMR spectroscopy

Pre-concentrated silver: FAAS analysis

Date: Apr 15, 2017

Author: David Bradley

Researchers in China have used a cloud point extraction (CPE) method to pre-concentrate trace levels of silver present in water samples for subsequent flame atomic absorption spectrometry (FAAS) analysis.

Read More thumbnail image: Pre-concentrated silver FAAS analysis

Chemical restoration: X-rays get beneath the paintwork

Date: Apr 15, 2017

Author: David Bradley

The Ghent Altarpiece was a family affair painted around 1432 by Flemish/Early Netherlandish artist Jan van Eyck and according to art historians probably his brother Hubert. Now, chemical imaging based on element-specific X-ray analysis of a large area of the work has revealed the original paint layers and assisted in cleanup and conservation.

Read More thumbnail image: Chemical restoration X-rays get beneath the paintwork

NMR revision: Compound all at sea

Date: Apr 15, 2017

Author: David Bradley

Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool and throws up chemical structure insights for even the most complex of natural products. Sometimes, however, those spectral lines can lead chemists to the wrong stereocentres and skeletons. An international team has now revised the structure of an important marine metabolite.

Read More thumbnail image: NMR revision Compound all at sea

Journal Highlight: Exploration of candidate biomarkers for human psoriasis based on gas chromatography-mass spectrometry serum metabolomics

Date: Apr 10, 2017

Author: spectroscopyNOW

Serum metabolomic profiles of patients with psoriasis have been examined to identify potential biomarkers and help to elucidate the pathogenesis of psoriasis and provide insights into early diagnosis and therapeutic intervention.

Read More thumbnail image: Journal Highlight Exploration of candidate biomarkers for human psoriasis based on gas chromatography-mass spectrometry serum metabolomics

Journal Highlight: Dynamic contact strain measurement by time-resolved stroboscopic energy dispersive synchrotron X-ray diffraction

Date: Apr 10, 2017

Author: spectroscopyNOW

The first dynamic contact strain measurement of a ball bearing using stroboscopic energy dispersive X-ray diffraction has been performed, examining the outer raceway of a test bearing.

Read More thumbnail image: Journal Highlight Dynamic contact strain measurement by time-resolved stroboscopic energy dispersive synchrotron X-ray diffraction

Journal Highlight: Spectroscopic studies on the interaction of chromium (VI) and chromium (III) with keyhole limpet hemocyanin

Date: Apr 10, 2017

Author: spectroscopyNOW

The interactions of keyhole limpet hemocyanin with chromium nitrate, potassium dichromate, and chromate have been studied using fluorescence, UV–vis absorption and circular dichroism spectroscopy under simulated physiological conditions.

Read More thumbnail image: Journal Highlight Spectroscopic studies on the interaction of chromium VI and chromium III with keyhole limpet hemocyanin

Journal Highlight: 'NMR Crystallization': in-situ NMR techniques for time-resolved monitoring of crystallization processes

Date: Apr 3, 2017

Author: spectroscopyNOW

An overview of the range of NMR strategies currently available for in-situ studies of crystallization processes is presented, with examples of applications that highlight their potential to deepen our understanding of crystallization phenomena.

Read More thumbnail image: Journal Highlight NMR Crystallization in-situ NMR techniques for time-resolved monitoring of crystallization processes

Journal Highlight: A New LA-ICP-MS Method for Ti in Quartz: Implications and Application to High Pressure Rutile-Quartz Veins from the Czech Erzgebirge

Date: Apr 3, 2017

Author: spectroscopyNOW

A new method has been proposed for determining 48Ti mass fractions in quartz by LA-ICP-MS at the 1 μg g−1 level, relevant to quartz in HP-LT terranes, using natural quartz as a reference material rather than NIST reference glasses.

Read More thumbnail image: Journal Highlight A New LA-ICP-MS Method for Ti in Quartz Implications and Application to High Pressure Rutile-Quartz Veins from the Czech Erzgebirge

Journal Highlight: Raman microspectroscopy as a useful tool for nanopathology

Date: Apr 3, 2017

Author: spectroscopyNOW

The possibilities and advantages of Raman microspectroscopy for the detection and characterization of particles of an unknown nature in human nasal mucosa and amniotic fluids have been surveyed.

Read More thumbnail image: Journal Highlight Raman microspectroscopy as a useful tool for nanopathology
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