Base Peak / Ezine
Journal Highlight: Evaluation of MALDI-TOFMS in comparison to rpoB gene sequencing for species identification of bloodstream infection staphylococcal isolates
Date: Feb 7, 2011
Author:
Matrix-assisted laser desorption ionization-time-of-flight mass spectrometry was evaluated for the identification of 450 blood isolates of the most relevant staphylococcal species, using sequence analysis of the rpoB gene as the reference method.
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Tissue on paper: Direct mass spectrometry of biopsy samples
Date: Feb 1, 2011
Author: Steve Down
The recently developed ambient technique known as paper spray mass spectrometry has been extended to the direct analysis of biological tissue from biopsies, detecting hormones, lipids and drugs within 1 minute from small samples.
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Popping out from glaciers: release of persistent pollutants contributes to increased lake levels
Date: Jan 15, 2011
Author: Steve Down
A study of two neighbouring Alpine lakes with different catchment areas has confirmed that glaciers represent secondary sources of persistent organic pollutants which will have more influence as climate warming increases.
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Journal Highlight: Olive oil or lard?: Distinguishing plant oils from animal fats in the archeological record of the eastern Mediterranean using GC/combustion/isotope ratio MS
Date: Jan 10, 2011
Author:
Compound-specific carbon stable isotope analyses of the C18:0 and C16:0 fatty acids from modern plant oils measured by gas chromatography/combustion/isotope ratio mass spectrometry were compared with those from a residue on an ancient Egyptian shard.
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A ROBIN is not just for Christmas: Is the rotating ball interface here to stay this time?
Date: Jan 1, 2011
Author: Steve Down
The little-used rotating ball interface for laser desorption/ionisation mass spectrometers has been rejuvenated by scientists in the USA and Russia, to produce detection limits at least one order of magnitude less than commercial LC/MS instruments when used for SALDI MS.
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Alcoholic spirits classified: SPME-MS of volatiles exposes plant origins
Date: Dec 15, 2010
Author: Steve Down
An SPME-MS method with no chromatographic separation has been used to distinguish the botanical origin of raw spirits between potato, rye and corn, with 100% classification accuracy and 96% prediction ability.
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Journal Highlight: Determination of sialic acids in infant formula by liquid chromatography tandem mass spectrometry
Date: Dec 6, 2010
Author:
A liquid chromatographic/tandem mass spectrometric method using pneumatically assisted electrospray ionization was developed for the determination of N-acetylneuramic acid and N-glycolylneuramic acid in infant formula
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Mechanically recovered meat: detection in foods using metabolomics
Date: Dec 1, 2010
Author: Steve Down
A metabolomics approach based on GC/MS analysis has been applied by scientists in the UK to distinguish mechanically recovered meat from other types of recovered meat and to detect its presence in meat products.
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The horny dilemma of the woolly rhino: isotope analysis hints at the ancient diet
Date: Nov 15, 2010
Author: Steve Down
The woolly rhinoceros enjoyed different summer and winter diets, claim Russian scientists, who have measured the isotopic compositions across a preserved horn and related them to the characteristic structural bands.
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Calcium isotope analysis by mass spectrometry
Date: Nov 8, 2010
Author:
The figures of merit of analytical methods and instrumentation used for the isotope analysis of calcium are reviewed and their limitations are critically assessed. Mass spectrometric methods applied to precise stable isotope analysis and to the determination of 41Ca are described, followed by a short summary of selected applications.
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