Combined cathodoluminescence spectroscopy, electron microprobe and laser ablation ICP mass spectrometry analysis: an attempt to correlate luminescence and chemical composition of monazite

2008 ◽  
Vol 161 (3-4) ◽  
pp. 313-321 ◽  
Author(s):  
Gloria Vaggelli ◽  
Roberto Cossio ◽  
Maurizio Petrelli ◽  
Piergiorgio Rossetti
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Chemical Composition ◽  
Electron Microprobe ◽  
Mass Spectrometry Analysis ◽  
Spectrometry Analysis ◽  
Cathodoluminescence Spectroscopy ◽  
Icp Mass Spectrometry

scholarly journals Chemical composition and microbiological evaluation of essential oil from Hyssopus officinalis L. with white and pink flowers

2018 ◽  
Vol 16 (1) ◽  
pp. 317-323 ◽  
Author(s):  
Tomasz Baj ◽  
Izabela Korona-Głowniak ◽  
Radosław Kowalski ◽  
Anna Malm
Keyword(s):  
Mass Spectrometry ◽  
Chemical Composition ◽  
Essential Oil ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Main Components ◽  
Different Content ◽  
Common Plant ◽  
Hyssopus Officinalis

AbstractHyssopus officinalis L. is a common plant that is most usually found in three color forms - f. cyaneus (blue), f. ruber Mill. (purple/pink) and f. albus Alef (white). In the present work, we evaluated the chemical composition and antimicrobial activity of essential oils obtained from Polish-sourced white- and pink-flowered H. officinalis. Gas chromatography-mass spectrometry analysis of the essential oil has shown that both forms of color have a different content of main components. The principle essential oil component of white-flowered H. officinalis L. was pinocamphone (51%), while pink-flowered H. officinalis L. contained almost equal amounts of pinocamphone (28.8%) and isopinocamphone (21.9%). Of note, the essential oil of the pink form was more active against Grampositive bacteria, especially against Bacillus subtilis.

scholarly journals Tip Enhanced Laser Ablation Sample Transfer for Mass Spectrometry

2015 ◽  
Vol 1754 ◽  
pp. 87-95 ◽  
Author(s):  
Kermit K. Murray ◽  
Suman Ghorai ◽  
Chinthaka A. Seneviratne
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Spatial Resolution ◽  
Single Cells ◽  
Sample Surface ◽  
Mass Spectrometry Analysis ◽  
Full Potential ◽  
Primary Analysis ◽  
Spectrometry Analysis ◽  
Sample Transfer

ABSTRACTMass spectrometry is one of the primary analysis techniques for biological analysis but there are technological barriers in sampling scale that must be overcome for it to be used to its full potential on the size scale of single cells. Current mass spectrometry imaging methods are limited in spatial resolution when analyzing large biomolecules. The goal of this project is to use atomic force microscope (AFM) tip enhanced laser ablation to remove material from cells and tissue and capture it for subsequent mass spectrometry analysis. The laser ablation sample transfer system uses an AFM stage to hold the metal-coated tip at a distance of approximately 10 nm from a sample surface. The metal tip acts as an antenna for the electromagnetic radiation and enables the ablation of the sample with a spot size much smaller than a laser focused with a conventional lens system. A pulsed nanosecond UV or visible wavelength laser is focused onto the gold-coated silicon tip at an angle nearly parallel with the surface, which results in the removal of material from a spot between 500 nm and 1 µm in diameter and 200 and 500 nm deep. This corresponds to a few picograms of ablated material, which can be captured on a metal surface for MALDI analysis. We have used this approach to transfer small peptides and proteins from a thin film for analysis by mass spectrometry as a first step toward high spatial resolution imaging.

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