The Column-02-20-2014
Characterization of Allergens in Cosmetics by GCXGC–TOF–MS with Variable-Energy Electron Ionization
February 20th 2014The detection and quantitation of allergens in complex cosmetics extracts using two-dimensional gas chromatography?time-of-flight mass spectrometry (GC?GC?TOF-MS) is described.
Marine Pollution Analysis: The Deepwater Horizon Oil Spill
February 20th 2014Chris Reddy from the Woods Hole Oceanographic Institution (WHOI) spoke to Alasdair Matheson of The Column about the role of chromatography in the ongoing environmental analysis of the Deepwater Horizon oil spill, how GC×GC works in practice, and why this oil spill led to the return of thin layer chromatography (TLC) to his laboratory.
Characterization of Allergens in Cosmetics by GC×GC–TOF-MS with Variable-Energy Electron Ionization
February 20th 2014The detection and quantitation of allergens in complex cosmetics extracts using two-dimensional gas chromatography–time-of-flight mass spectrometry (GC×GC–TOF-MS) is described. In particular, variable-energy electron ionization is shown to enhance both the sensitivity and selectivity of analyses by generating mass spectra containing structurally significant fragment ions with an improved molecular ion signal.
