Markes International, Ltd.

Tube-based thermal desorption for monitoring chemical warfare agents Malathion, Russian VX and mustard gas at ultratrace levels without degradation or losses.

This app note describes automated, high-performance GC–MS analysis of humid 'air toxics' samples in canisters, using a cryogen-free system for preconcentration and TD.

This application note shows the robust, reproducible analysis of trace VOCs in hydrogen fuel by TD–GC–MS/SCD.

Using thermal desorption–GC–MS is to address multiple challenges in the detection of microplastics in different salt samples.

This study investigates the performance of a high-throughput automated thermal desorption instrument coupled to GC–MS/MS for PFAS analysis.

TD–GC–MS analysis of VOCs in air using H2 carrier gas meets all the performance criteria cited in US EPA Method TO-17, including linearity, reproducibility & MDLs.

Automated, high-sensitivity analysis of residual fumigants for food safety testing by multi-step enrichment–headspace–trap (MSE–HS–trap) with GC–MS.

Webinar Date/Time: Thu, Jun 8, 2023 11:00 AM EDT

An introduction to microchamber sampling for the rapid screening of chemical emissions from construction materials and consumer products

This application note shows the robust, reproducible analysis of trace VOCs in hydrogen fuel by TD–GC–MS/SCD.

Theory and practice of using axial and radial samplers for passive (diffusive) monitoring of VOCs in air

Personal exposure testing of nitrous oxide can be done via passive and breath sampling using Markes’ Bio-VOC and TD–GC.

Advice on which sorbent to use for pumped (diffusive) tube monitoring of various vapour-phase organics; suggests parameters for conditioning and storing packed tubes.

How TD benefits a wide range of industrial emissions testing applications, offering compatibility with both whole-air/gas containers and sorbent tubes

Demonstrating the efficient use of online and off-line trace-level analysis of thermally labile sulfur compounds by TD–GC; used in air monitoring and industry.

Webinar Date/Time: Thursday, June 15th, 2023 at 8am PDT | 11am EDT | 4pm BST | 5 pm CEST

Analysis of trace per- and polyfluorinated organic vapours in air using cryogen-free thermal desorption and gas chromatography–mass spectrometry

A demonstration of how TD–GC–MS/MS enables measurement of per- and polyfluoroalkyl substances (PFAS) in air at concentrations as low as 2 pg/m3.

Wednesday 19th October 2022 at 9am EDT | 2pm BST | 3pm CEST Join this webinar from Markes International to hear Dr. Ariel Geer Wallace from the US EPA discuss her research into methods of PFAS destruction, and the technology she is using to benchmark the effectiveness of thermal treatment techniques.

Tue, Aug 9, 2022 11:00 AM EDT In this webinar, we explain how to analyse a wide range of volatile organic impurities from hydrogen fuel in a single run using “hydrogen-certified” thermal desorption with GC–MS and specific detectors ( SCD), complying with relevant global standards. Thanks to optimised preconcentration technology, the technique has proven to be more sensitive than alternative techniques and systems, while the ability to run both on-line and off-line samples gives ultimate flexibility to the analyst.

Identification of impurities in hydrogen fuel supplies was demonstrated using an on-line thermal desorption–GC–MS system, which complied with various standard methods.

Using high-capacity sorptive extraction with TD–GC–MS analysis for flavour profiling of cider and potato chips, contrasting unflavoured and flavoured-added products

Sampling and analysis of a challenging range of trace-level volatile & semi-volatile vapours of per- & polyfluorinated alkyl substances (PFAS) in air using TD–GC–MS

Using sorptive extraction to extract aroma compounds from honey, with automated statistical analysis to uncover differences and determine markers of authenticity

Demonstrating how a Markes Multi-Gas TD can operate with hydrogen carrier gas as well as it does with helium to meet all the criteria cited in US EPA Method TO-17

The complementary roles of dynamic headspace and sorptive extraction in the analysis of fragranced consumer products using TD–GC–MS 

Analysis of VOC and FOG emissions from automotive interior materials by direct desorption TD–GC–MS in accordance with VDA 278

An application note demonstrating the quantitative analysis of microplastics using direct thermal desorption (TD) combined with GC–MS

A study describing the advantages of using tube-based thermal desorption for monitoring chemical warfare agents at ultratrace levels

Application note discussing innovative cryogen-free ambient air monitoring in compliance with US EPA Method TO-15