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Turbulence under the sun: Determining exposure to sunscreen ingredients

Date: Jan 15, 2018

Author: Jon Evans

By combining a sample preparation method called turbulence flow chromatography with LC-MS, German scientists have been able to detect three metabolites of a sunscreen ingredient in urine.

Read More thumbnail image: Turbulence under the sun Determining exposure to sunscreen ingredients

Journal Highlight: Sample preparation for large-scale bioanalytical studies based on liquid chromatographic techniques

Date: Jan 8, 2018

Author: separationsNOW

In this literature review, chemists from Romania detail the main sample preparation techniques used for large-scale bioanalytical studies with liquid chromatography, including protein precipitation, liquid–liquid extraction, solid-phase extraction and derivatization.

Read More thumbnail image: Journal Highlight Sample preparation for large-scale bioanalytical studies based on liquid chromatographic techniques

Journal Highlight: A platinized stainless steel fiber with in-situ coated polyaniline/polypyrrole/graphene oxide nanocomposite sorbent for headspace SPME of aliphatic aldehydes in rice samples

Date: Dec 25, 2017

Author: separationsNOW

Chemists in Iran coated a nanocomposite film onto a stainless steel fiber for solid-phase microextraction of linear aliphatic aldehydes from rice samples, prior to analysis by gas chromatography.

Read More thumbnail image: Journal Highlight A platinized stainless steel fiber with in-situ coated polyanilinepolypyrrolegraphene oxide nanocomposite sorbent for headspace SPME of aliphatic aldehydes in rice samples

Taking the plume plunge: Analyzing amino acids in a jet of alien water

Date: Dec 18, 2017

Author: Jon Evans

Capturing amino acids from plumes of water escaping from an icy moon of Saturn may be quite a challenge, but extracting the amino acids for analysis by microchip electrophoresis turns out to be surprisingly easy.

Read More thumbnail image: Taking the plume plunge Analyzing amino acids in a jet of alien water

Journal Highlight: Determination of tanshinones in Danshen (Salvia miltiorrhiza) by HPLC with fluorescence detection after pre-column derivatisation

Date: Dec 11, 2017

Author: separationsNOW

Scientists in Japan have developed a derivatization method for detecting tanshinones, a major class of bioactive ingredients in the medical herb Danshen, by high-performance liquid chromatography with fluorescence detection.

Read More thumbnail image: Journal Highlight Determination of tanshinones in Danshen Salvia miltiorrhiza by HPLC with fluorescence detection after pre-column derivatisation

Journal Highlight: Characterization of ancient lipids in prehistoric organic residues: Chemical evidence of livestock-pens in rock-shelters since early neolithic to bronze age

Date: Nov 27, 2017

Author: separationsNOW

Scientists in Spain used microwave-assisted extraction and solid-phase extraction to extract ancient lipids from prehistoric sediments prior to analysis by gas chromatography with mass spectrometry.

Read More thumbnail image: Journal Highlight Characterization of ancient lipids in prehistoric organic residues Chemical evidence of livestock-pens in rock-shelters since early neolithic to bronze age

Phospholipid problem solving: Extracting phospholipids with a modified silica gel

Date: Nov 20, 2017

Author: Jon Evans

Polish scientists have developed a novel solid-phase extraction technique based on a modified silica gel for removing interfering phospholipids from blood.

Read More thumbnail image: Phospholipid problem solving Extracting phospholipids with a modified silica gel

Journal Highlight: Graphene-based molecularly imprinted polymer for separation and pre-concentration of trace polycyclic aromatic hydrocarbons in environmental water samples

Date: Nov 13, 2017

Author: separationsNOW

Scientists from South Africa and India have produced a composite of reduced graphene oxide and pyrene-imprinted polymer for the solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples.

Read More thumbnail image: Journal Highlight Graphene-based molecularly imprinted polymer for separation and pre-concentration of trace polycyclic aromatic hydrocarbons in environmental water samples

Journal Highlight: Probing skin physiology through the volatile footprint: Discriminating volatile emissions before and after acute barrier disruption

Date: Oct 23, 2017

Author: separationsNOW

Researchers in Ireland have used a small wearable housing integrating a solid-phase micro-extraction fiber, together with gas chromatography-mass spectrometry, to analyze the volatile organic compounds emitted by human skin.

Read More thumbnail image: Journal Highlight Probing skin physiology through the volatile footprint Discriminating volatile emissions before and after acute barrier disruption

More than the sum of its parts: Detecting endotoxins with SPE, CE and LIF

Date: Oct 16, 2017

Author: Jon Evans

A combination of solid-phase extraction, capillary electrophoresis and laser-induced fluorescence detection produces a sensitive and highly selective method for detecting bacterial endotoxins.

Read More thumbnail image: More than the sum of its parts Detecting endotoxins with SPE CE and LIF
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