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Journal Highlight: Understanding the molecular interaction in solutions by chemometric resolution of near−infrared spectra

Date: Dec 11, 2017

Author: spectroscopyNOW

A chemometric method for resolving overlapping analytical signals from components in solution based on the rotation of the loadings in PCA has been used to calculate the spectra of ethanol and water from the NIR spectra of ethanol−water mixtures.

Read More thumbnail image: Journal Highlight Understanding the molecular interaction in solutions by chemometric resolution of nearinfrared spectra

Box–Behnken design makes rhubarb extracts fine

Date: Dec 1, 2017

Author: Ryan De Vooght-Johnson

Medicinal rhubarb has long being used in traditional Chinese medicine, but accurate assays of its many active compounds are hampered by the expense of analytical standards. Scientists from Tianjin University and Tianjin University of Traditional Chinese Medicine have developed a new methods of assaying multiple rhubarb compounds by quantitative analysis of multi-components with a single marker (QAMS), while also optimising their extraction with a Box–Behnken design.

Read More thumbnail image: BoxBehnken design makes rhubarb extracts fine

CID detects triglyceride positional isomers

Date: Nov 15, 2017

Author: Ryan De Vooght-Johnson

The amount and types of triglycerides (fats and oils) in the diet are linked to a number of disease conditions, but current methods of determining the exact position of the fatty acids on the glycerol portion of these compounds are slow and cumbersome. Scientists from the University of Massachusetts Boston have devised a new method employing mass spectrometry to distinguish between the different positional isomers of triglycerides.

Read More thumbnail image: CID detects triglyceride positional isomers

Hybrid perovskites: Terahertz communications boost

Date: Nov 15, 2017

Author: David Bradley

A hybrid inorganic-organic perovskite that has the same structure as the original mineral can be layered on to a silicon wafer to build a component of future terahertz communications devices according to research from the University of Utah.

Read More thumbnail image: Hybrid perovskites Terahertz communications boost

Journal Highlight: Comparative chemometric analysis for classification of acids and bases via a colorimetric sensor array

Date: Nov 13, 2017

Author: spectroscopyNOW

An 8 sensor colorimetric array was used to analyze acid and basic samples to determine whether PCA, HCA, or LDA is the best chemometric method for classification quantification of analytes within clusters.

Read More thumbnail image: Journal Highlight Comparative chemometric analysis for classification of acids and bases via a colorimetric sensor array

Clever chemometrics catches funny honey cheats

Date: Nov 1, 2017

Author: Ryan De Vooght-Johnson

Honey commands a variety of prices, depending in part on the source of the nectar from which it is derived, which may lead to fraudulent false labelling. Scientists from the Chinese Academy of Inspection and Quarantine in Beijing and Agilent Technologies (China) have devised a new method for detecting the source of honey samples, using GC-MS combined with chemometric methods.

Read More thumbnail image: Clever chemometrics catches funny honey cheats

Journal Highlight: Liver histology and diffusion-weighted MRI in children with nonalcoholic fatty liver disease: A MAGNET study

Date: Oct 16, 2017

Author: spectroscopyNOW

Potential associations between histologic features of pediatric nonalcoholic fatty liver disease and estimated quantitative magnetic resonance diffusion-weighted imaging (DWI) parameters have been explored.

Read More thumbnail image: Journal Highlight Liver histology and diffusion-weighted MRI in children with nonalcoholic fatty liver disease A MAGNET study

Small peaks are amplified when stochastic noise is applied

Date: Oct 15, 2017

Author: Ryan De Vooght-Johnson

Small chromatographic peaks that are hidden by baseline noise can be made clearer by employing stochastic resonance, which involves the addition of a limited amount of additional noise. Researchers from China Pharmaceutical University in Nanjing, Nanjing University of Chinese Medicine and Nanjing Changao Pharmaceutical Technology have reported an improved algorithm for the amplification of peaks using stochastic resonance, demonstrating its use with two different examples.

Read More thumbnail image: Small peaks are amplified when stochastic noise is applied

Better bread and beer: Chemometric bakeoff

Date: Oct 15, 2017

Author: David Bradley

The use of multivariate data has allowed researchers from the Department of Food Science (FOOD) at the University of Copenhagen in Denmark to build a regression model of the analysis of whole grains at long near-infrared (NIR) wavelengths obtained with a supercontinuum laser. The research could improve our understanding of the chemistry of food ingredients with implications for improving bread and beer.

Read More thumbnail image: Better bread and beer Chemometric bakeoff

Discover leading research in cannabis detection

Date: Oct 3, 2017

Author:

Cannabinoid research from an analytical viewpoint is rapidly developing as a more liberal approach to the medical, legal and social issues of the drug is adopted. Start reading our cannabinoid collection of papers here - free to access until the end of December.

Read More thumbnail image: Discover leading research in cannabis detection
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