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Journal Highlight: Sample preparation in foodomic analyses

Date: Jul 9, 2018

Author: separationsNOW

The use of highly sophisticated instruments for high‐performance and high‐throughput analyses, as well as miniaturization and the use of laboratory robotics in metabolomics, proteomics, peptidomics, and genomics, have been reviewed.

Read More thumbnail image: Journal Highlight Sample preparation in foodomic analyses

Journal Highlight: Microbial and metabolic multi‐omic correlations in systemic sclerosis patients

Date: Jun 25, 2018

Author: separationsNOW

The fecal microbiota and plasma metabolomes of patients with systemic sclerosis have been characterised, showing that a reduced model of nine bacteria can differentiate patients from healthy controls.

Read More thumbnail image: Journal Highlight Microbial and metabolic multiomic correlations in systemic sclerosis patients

Journal Highlight: Updating chromatographic predictions by accounting ageing for single and tandem columns

Date: Jun 11, 2018

Author: separationsNOW

Models for predicting chromatographic behaviour on single and coupled columns which have aged have been adapted to correct the time and peak profiles.

Read More thumbnail image: Journal Highlight Updating chromatographic predictions by accounting ageing for single and tandem columns

Columns calculations converted to account for ageing

Date: May 30, 2018

Author: Ryan De Vooght-Johnson

Modelling techniques allow for the prediction of the chromatographic behaviour of many compounds, but in practice much chromatography is carried out on old columns, the properties of which will probably have changed over time. Scientists from the University of Valencia, Spain, looked at how models could be adapted to account for the changes in HPLC column properties over the years.

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Journal Highlight: A simple, fast, and accurate thermodynamic‐based approach for transfer and prediction of gas chromatography retention times between columns and instruments Part III: Retention time prediction on target column

Date: May 7, 2018

Author: separationsNOW

Models have been derived for the transfer and prediction of retention time from a reference GC column to the target column using experimental data for a separate mixture of compounds, based on the thermodynamic‐based parameters of the target compound on the reference column.

Read More thumbnail image: Journal Highlight A simple fast and accurate thermodynamicbased approach for transfer and prediction of gas chromatography retention times between columns and instruments Part III Retention time prediction on target column

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

Journal Highlight: Metabolite identification of the antimalarial naphthoquine using liquid chromatography–tandem high‐resolution mass spectrometry in combination with multiple data‐mining tools

Date: Apr 9, 2018

Author: separationsNOW

Metabolite profiling of naphthoquine has been studied in six liver microsomal incubates, seven recombinant CYP enzymes and the rat model by LC-HRMSn in conjunction with online H/D exchange and multiple data‐mining tools applied in tandem.

Read More thumbnail image: Journal Highlight Metabolite identification of the antimalarial naphthoquine using liquid chromatographytandem highresolution mass spectrometry in combination with multiple datamining tools

Thermal Gradient Separation optimised by simulation

Date: Apr 1, 2018

Author: Ryan De Vooght-Johnson

High-temperature thermal gradient interaction chromatography (HT-TGIC) is a method that involves putting copolymers through heated columns in order to determine their chemical composition distribution (CCD), i.e. the ratio of the different monomer units. Scientists from Bangkok and Canada used mathematical modelling to examine the effect of having multiple adsorption/desorption stages during HT-TGIC elution, so-called multiple high-temperature thermal gradient interaction chromatography (m-HT-TGIC).

Read More thumbnail image: Thermal Gradient Separation optimised by simulation

Sagacious examination helps sage identification

Date: Mar 15, 2018

Author: Ryan De Vooght-Johnson

The roots of the medicinal plant Salvia miltiorrhiza or danshen are widely used in traditional Chinese medicine (TCM), but are sometimes fraudulently substituted by other Salvia (sage) species. Researchers from the Shenzhen Institute for Drug Control and the University of Macao (both China) developed a method to distinguish Salvia miltiorrhiza from two related species using HPLC and chemometric methods.

Read More thumbnail image: Sagacious examination helps sage identification

Journal Highlight: Determining degree of roasting in cocoa beans by artificial neural network (ANN) based electronic nose system and gas chromatography/mass spectrometry (GC/MS)

Date: Mar 12, 2018

Author: separationsNOW

An electronic nose system based on an array of gas sensors and GC/MS were both used in conjunction with artificial neural networks to predict the degree of roasting of cocoa beans with equal success.

Read More thumbnail image: Journal Highlight Determining degree of roasting in cocoa beans by artificial neural network ANN based electronic nose system and gas chromatographymass spectrometry GCMS
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