Base Peak / Ezine
New use for old spice: Curcumin as MALDI imaging matrix
Date: Jul 2, 2013
Author: Steve Down
Curcumin, the spice normally used in cooking, has been used successfully as a matrix for MALDI imaging studies of a variety of samples, including fingermarks and tissue, performing at least as well as the classical matrix compound.
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Sudan dyes in seconds: Paper spray mass spectrometry for chilli powder tests
Date: Jun 15, 2013
Author: Steve Down
Paper spray mass spectrometry has been applied to measure five Sudan dyes simultaneously in chilli pepper within 60 seconds, providing a green, high-throughput method that could be used in quality control labs.
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Journal Highlight: Comparison of direct mass spectrometry methods for the on-line analysis of volatile compounds in foods
Date: Jun 10, 2013
Author: spectroscopyNOW
This study highlighted the equivalent performances of APCI-MS and PTR-MS for in vitro and in vivo flavour release investigations and provided useful data on the problematic use of sample bags for headspace analyses.
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Filter paper prop: Support for biological samples in well plates for forensic drug analysis
Date: Jun 1, 2013
Author: Steve Down
Filter paper has been used as a support in 96-well plates for ten types of biological fluids and tissues in the post-mortem LC/MS analysis of the alkaloid colchicine, in which the calibration curve for dried blood spots can be applied to most of the other sample types.
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Food-grade paperboard: Odour profiling with mass spec-based electronic nose
Date: May 15, 2013
Author: Steve Down
The odour profile of recycled paperboard bound for food packaging applications has been evaluated by a mass spectrometric-based electronic nose to provide a quick option for quality control.
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Journal Highlight: Mass spectrometry imaging under ambient conditions
Date: May 7, 2013
Author: spectroscopyNOW
Recent developments and applications of ambient ionization techniques for mass spectrometry imaging have been reviewed and the role of bioinformatics in acquiring and interpreting the chemical and spatial information is described.
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Cocaine on currency: Higher levels associated with criminality
Date: May 1, 2013
Author: Steve Down
US scientists have analysed 17 years worth of data on the contamination of currency with cocaine to determine the levels which are statistically higher than background, so that banknotes contaminated by drug-related crime rather than general contamination during circulation can be identified.
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Polarity changes: Simultaneous positive and negative modes in DESI
Date: Apr 15, 2013
Author: Steve Down
Danish scientists have introduced a dual-mode imaging system for desorption ionisation mass spectrometry, in which images can be acquired in positive and negative mode simultaneously.
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Journal Highlight: Soft ionization mass spectroscopy: Insights into the polymerization mechanism
Date: Apr 8, 2013
Author: spectroscopyNOW
This review is focused on the use of soft ionization mass spectroscopy to characterize the products of polymerization/degradation reactions thereby yielding mechanistic information.
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Chocolate threats: Carcinogenic PAHs
Date: Apr 1, 2013
Author: Steve Down
Several polycyclic aromatic hydrocarbons have been determined in chocolate by GC/MS following a specially devised SPME procedure, giving a more sensitive method than an HPLC procedure developed in 2012 by the same research group.
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