ULTRA-xr

The US EPA Method 327 mandates fenceline monitoring at petroleum refineries. Markes analyzed ethylene oxide as part of an air toxics study in compliance with US EPA Method 327. Examine the steps that were taken for evaluating method performance and testing system capability, with an emphasis on eliminating the use of liquid cryogen during the analysis. Explore how Markes’ UNITY–CIA Advantage-xr™ with Kori-xr™ was used to generate data in line with the draft Method 327, demonstrating improved sensitivity, ease of method transfer between labs, and productivity without the need for cryogenic cooling.

In this application guide, Markes International details the utilization of thermal desorption (TD) for essential applications in food and drink volatile organic compound (VOC) profiling. The guide encompasses a range of applications, such as comparing different cheese brands and enhancing the shelf-life of ready-to-eat fresh-cut fruit. Aroma profiling is emphasized as a crucial tool for manufacturers to identify volatile components, influencing product quality positively or negatively, and enabling quality maintenance and improvement.

In this poster, Markes International demonstrate that TD can be used to analyse the most challenging environmental contaminants in both discovery and routine applications.

This application note provides an overview of options for the diffusive sampling of benzene and other hydrocarbons in air.

This application note describes a specific procedure for identifying and quantifying the masses of individual volatile organic compounds (VOCs) which are emitted into a flow of air from materials including (wood panels, paints, coatings, polyurethane foams) and collected on sorbent sampling tubes during emissions testing. It also provides a method of estimating the level of total volatile organic compounds (TVOCs) as compared to a reference compound (toluene).

This Application Note demonstrates the suitability of Markes’ UltaA-UNITY automated thermal desorption system for performing the analysis of volatile and semi-volatile organic chemicals (VOCs and SVOCs) in three types of automotive trim materials (polypropylene, artificial leather and foam) in accordance with VDA Method 278.

This Application Note shows how TargetView compound identification software can be used to rapidly and confidently identify volatile compounds in wine associated with the spoilage yeast Dekkera (Brettanomyces) bruxellensis (‘Brett’).

In this Application Note it is shown that there is excellent correlation between emission tests on a sample of PVC wall covering obtained with Markes’ Micro-Chamber/ Thermal Extractor™ (µ-CTE™) and those from a conventional emission chamber. This confirms the Micro-Chamber/Thermal Extractor as an ideal tool for the rapid evaluation of emissions from materials during routine quality control and as part of product development.

This Application Note demonstrates the fundamental sensitivity of Markes’ ULTRA–UNITY system for the analysis of TO-17 ‘air toxics’ ranging in volatility from chloromethane to hexachlorobutadiene. Also highlighted is the ability of Markes’ ClearView background-compensation software to improve signal-to-noise ratios and enhance spectral purity for trace-level compounds.

As a consequence of their content and decomposition processes, landfill sites containing domestic and commercial waste produce a variety of odorous and toxic volatile organic compounds (VOCs). Landfill gases require monitoring, therefore a complete thermal desorption GCMS method has been successfully developed for the highly complex mixture of toxic and priority odorous VOCs found in landfill gas. This application note describes the use of the Markes ULTRA-UNITY TD system linked to the Agilent 6890 GC 5973 MS to analyze mixtures of landfill gas.

The thermal desorption (TD) instruments are safety-certified to run on three gases: helium, nitrogen and hydrogen.