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Analysis of Trace-Level VVOCs and VOCs in High-Humidity Ambient Air by Thermal Desorption–GC–MS: Addressing Water Management Issues
8 Mar 2017This application note describes how thermal desorption (TD) with GC–MS can be used to analyse trace-levels of volatile and very volatile organic compounds (VOCs and VVOCs) in ambient air. The article compares options for adapting these methods for high humidity samples, including use of the new Kori-xrTM system. The article highlights the benefits of Kori-xr, including enhanced recovery of low-boiling and polar VOCs and its sensitivity to important polar compounds ethanol and acetone
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Kori-xr
Markes International LtdWater removal device for use with UNITY™–Air Server-xr™ thermal desorption systems.
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Atomic Absorption / Emission SpectroscopyAtomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES) — also called optical emission spectroscopy (OES) — are used to detect the elemental constituents in samples. Both techniques involve the atomization of a sample. Atomic absorption spectrometers may use a flame or furnace to create an atomic vapor of the sample before irradiation with spectral light. Optical emission spectrometers may use a flame, inductively coupled plasma (ICP), microwave plasma (MP) or spark arcs to atomize and excite the sample. At higher excitation energies, electrons can be emitted instead of photons, which can be useful for samples that can’t be atomized and for surface analysis. Explore electron spectroscopy equipment such as Auger spectrometers and photoelectron spectrometers for surface elemental analysis of samples. Find the best atomic absorption, photoelectron and optical emission spectrometers in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.GC-MS GC-MS (gas chromatography-mass spectrometry) instruments and equipment are used to separate, quantify and identify mixtures of small and volatile compounds, such as polycyclic aromatics, fatty acids and alcohols. Often used in drug detection, forensic investigation and environmental analysis for pesticides and contaminants, GC-MS is a powerful addition to your lab’s analytical capabilities. GC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzers can give greater sensitivity and resolution to your analysis. Find the best GC-MS instruments and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Volatile Organic Compounds (VOCs)Volatile organic compounds (VOCs) are chemicals that have a low boiling point. Some VOCs are harmful to human health, whereas others can be used to determine the shelf-life of foods samples. Thermal DesorptionThermal desorption is a technique used to release volatile compounds from solid samples by heating them. It is often used in environmental testing and analysis of complex materials. Explore thermal desorption systems in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Air Quality