Base Peak / Ezine
Tipping point: Wooden toothpicks for ambient ionisation of illegal drugs
Date: Feb 1, 2013
Author: Steve Down
Ketamine and its major metabolite norketamine have been measured in urine and oral fluid by ambient electrospray mass spectrometry using a wooden toothpick as the sample holder.
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Hydrogen from silicon: Just add water
Date: Feb 1, 2013
Author: David Bradley
Two techniques, X-ray photoelectron spectroscopy (XPS) and time-of-flight-secondary-ion-mass-spectrometry (TOF-SIMS), have been used in parallel to show how adding water to silicon can generate hydrogen. The work might take us another step closer to the so-called carbon-free hydrogen economy.
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Fading dyes: Crystal violet degradation under UV light
Date: Jan 16, 2013
Author: Steve Down
The full range of crystal violet photodegradation products have been identified by mass spectrometry, shedding light on the discolouration of historical artefacts and works of art.
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Journal Highlight: Laser diode thermal desorption mass spectrometry for the analysis of quinolone antibiotic residues in aquacultured seafood
Date: Jan 14, 2013
Author: spectroscopyNOW
Flumequine, oxolinic acid and nalidixic acid were extracted from catfish, shrimp and salmon and analysed by laser diode thermal desorption atmospheric pressure chemical ionization with tandem mass spectrometry.
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Miniature mass spec for space: Prototype dual laser TOF for aromatic organic compounds
Date: Jan 7, 2013
Author: Steve Down
A novel miniature time-of-flight mass spectrometer featuring two-step laser desorption/ionisation has been developed by scientists in the US for planetary research, aimed specifically at the identification of polycyclic aromatic compounds.
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Going wild: Pesticide screening method for poisoned wildlife and pets
Date: Dec 16, 2012
Author: Steve Down
Suspected poisoning of wildlife, pets and livestock can be rapidly assessed by a new multi-residue LC/MS/MS method for pesticides developed by Scottish government chemists.
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Journal Highlight: Implementation of proton transfer reaction-mass spectrometry (PTR-MS) for advanced bioprocess monitoring
Date: Dec 10, 2012
Author: spectroscopyNOW
The implementation of PTR-MS technology for on-line monitoring of volatile organic compounds in the off-gas of bioreactors is described, including the development of an interface between the bioreactor and an analyzer for continuous sampling.
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Single cell spectrometry: Inkjet printing and ambient mass spectrometry for lipid profiling
Date: Dec 2, 2012
Author: Steve Down
The phospholipids in single cells that have been printed using a custom inkjet printer were analysed by liquid extraction surface analysis coupled to nanospray mass spectrometry, allowing cell types to be differentiated.
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Bacterial identity parade: Volatile profiles classify Gram-negative species within minutes
Date: Nov 15, 2012
Author: Steve Down
Gram-negative bacteria can be identified and distinguished after just 24 hours of growth via their volatile compound profiles using ion/molecule reaction mass spectrometry in a test that takes just 3 minutes and is suitable for clinical testing.
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Journal Highlight: Fragmentation of toxicologically relevant drugs in negative-ion liquid chromatography-tandem mass spectrometry
Date: Nov 12, 2012
Author: spectroscopyNOW
The class-specific fragmentations of toxicologically relevant compounds in negative-ion MS–MS have been reviewed by collating more than 500 spectra from three libraries.
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