Dr Laura McGregor received her Ph.D. in Environmental Forensics in 2012 from the University of Strathclyde in Glasgow. Dr McGregor’s research interests included the chemical fingerprinting of environmental contamination using advanced analytical techniques such as GC×GC–MS. In January 2013, she joined Markes International as a Sales Support Specialist, and in January 2015 became Product Marketing Manager for their time-of-flight mass spectrometry (TOF MS) products.
A series of application briefs provides detailed studies of flavour profiling of a variety of beverages by high-capacity sorptive extraction with analysis by thermal desorption–gas chromatography–mass spectrometry (TD–GC–MS). The beverages under investigation were milk, filter coffee, herbal infusions, alchoholic spirits and premium teas.
This application note describes the GC–MS analysis of humidified canister ‘air toxics’ samples at various relative humidities, using cryogen-free systems for thermal desorption preconcentration. Detection of 65 target compounds ranging in volatility from propene to naphthalene is demonstrated with excellent peak shape and performance well within the criteria set out in US EPA Method TO-15.
The note describes how sampling devices, such as Markes’ Micro-Chamber/Thermal Extractor, used in conjunction with analysis by thermal desorption–gas chromatography–mass spectrometry (TD–GC–MS) can allow rapid and convenient sampling of such chemicals from the wide range of construction materials used in these cases, and how new test schemes are being used by industry to certify these materials.
