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Colorful detection: Coupling colorimetry with capillary electrophoresis

Date: Dec 18, 2017

Author: Jon Evans

By slotting three capillaries inside each other, Chinese scientists have found a way to combine capillary electrophoresis with gold nanoparticle-based colorimetry.

Read More thumbnail image: Colorful detection Coupling colorimetry with capillary electrophoresis

Journal Highlight: Derivatization agents for electrochemical detection in amino acid, peptide and protein separations: The hidden electrochemistry?

Date: Dec 11, 2017

Author: separationsNOW

This review covers electrochemical derivatization reagents and electrochemical tags employed for amino acids, peptides and proteins in separation techniques.

Read More thumbnail image: Journal Highlight Derivatization agents for electrochemical detection in amino acid peptide and protein separations The hidden electrochemistry

Journal Highlight: Comparison of linear intrascan and interscan dynamic ranges of Orbitrap and ion-mobility time-of-flight mass spectrometers

Date: Dec 5, 2017

Author: separationsNOW

Swiss food scientists have investigated the linear intrascan and interscan dynamic ranges of high-resolution mass spectrometers when analyzing metabolites in complex samples.

Read More thumbnail image: Journal Highlight Comparison of linear intrascan and interscan dynamic ranges of Orbitrap and ion-mobility time-of-flight mass spectrometers

Propelling pencils into analysis: Amperometric detection with pencil leads

Date: Nov 20, 2017

Author: Jon Evans

A normal graphite pencil lead from a propelling pencil, costing just a few cents, makes a highly sensitive electrode for amperometric detection, say Brazilian researchers.

Read More thumbnail image: Propelling pencils into analysis Amperometric detection with pencil leads

Journal Highlight: Isolation of three triterpene saponins, including two new oleanane derivatives, from Soldanella alpina and HILIC–ELSD of these three saponins in four Soldenella species

Date: Nov 13, 2017

Author: separationsNOW

Scientists from Austria and Switzerland used hydrophilic interaction liquid chromatography with several detection techniques, including mass spectrometry, NMR and evaporative light scattering detection, to analyze saponins in the alpine snowbell.

Read More thumbnail image: Journal Highlight Isolation of three triterpene saponins including two new oleanane derivatives from Soldanella alpina and HILICELSD of these three saponins in four Soldenella species

Journal Highlight: Single-molecule mass spectrometry

Date: Nov 6, 2017

Author: separationsNOW

This review explores the merits, limitations and applications of several single-molecule mass spectrometry techniques, including quadrupole ion trap with optical detection, Fourier transform ion cyclotron resonance and nanomechanical oscillators.

Read More thumbnail image: Journal Highlight Single-molecule mass spectrometry

A gap opens up: Analyzing protein binding with CE and surface plasmon resonance

Date: Oct 16, 2017

Author: Jon Evans

To analyze protein binding with capillary electrophoresis and surface plasmon resonance, Dutch scientists found they needed to scratch a gap into a gold sensor.

Read More thumbnail image: A gap opens up Analyzing protein binding with CE and surface plasmon resonance

Journal Highlight: An approach to estimate the activation energies of fragmentation occurring in quadrupole collision cell of the mass spectrometer

Date: Oct 9, 2017

Author: separationsNOW

Hungarian chemists used the classical semi-quantitative Rice-Ramsperger-Kassel theory to calculate the fragmentation energies generated by the collision-induced dissociation reaction in tandem mass spectrometry.

Read More thumbnail image: Journal Highlight An approach to estimate the activation energies of fragmentation occurring in quadrupole collision cell of the mass spectrometer

Journal Highlight: A comparison of electrospray ionization, atmospheric pressure chemical ionization, and atmospheric pressure photoionization for the LC-MS/MS analysis of bisphenols

Date: Oct 3, 2017

Author: separationsNOW

Chemists in the US have tested the ability of three ionization methods for use with liquid chromatography-tandem mass spectrometry at analyzing biphenols in paper receipts and US dollar bills.

Read More thumbnail image: Journal Highlight A comparison of electrospray ionization atmospheric pressure chemical ionization and atmospheric pressure photoionization for the LC-MSMS analysis of bisphenols

We go together: Detecting oxidants and antioxidants with a single electrode

Date: Sep 19, 2017

Author: Jon Evans

Chinese scientists have shown that a combination of capillary electrophoresis and amperometry with a platinum electrode coated in platinum nanoparticles can simultaneously detect hydrogen peroxide and ascorbic acid.

Read More thumbnail image: We go together Detecting oxidants and antioxidants with a single electrode
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