Markes International, Ltd.

Analysis of VPH in environmental samples by automated flow-modulated headspace–GC×GC–FID, for robust and efficient sample quantitation.

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

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

Evaluating the effect of storage and packaging on the volatile composition of soft drinks with immersive sorptive extraction & GC×GC–TOF MS.

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

A method to collect and analyse ozone-depleting substances & halogenated greenhouse gases in 100% humidity ambient air with a cryogen-free preconcentration–GC–MS system

Webinar Date/Time: Tue, May 14, 2024 10:00 AM EDT

Automated high-capacity sorptive extraction with GC–MS for screening wine, at ppb levels, for two yeast-derived spoilage compounds in wine.

Application note shows how thermal desorption GC–MS is used to monitor the release of PFAS during the application of aqueous film-forming foam (AFFF).

Demonstrating how commercially available TD equipment is used to monitor CF4 & other products of incomplete destruction (PIDs) resulting from PFAS removal technologies.

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

Measuring PFAS pollution in ambient air with TD–GC–MS/MS at concentrations low as 2 pg/m3. Each of 19 targeted compounds had linear calibration with high repeatability.

Webinar Date/Time: Tue, Oct 31, 2023 10:00 AM EDT

Air quality measurement: Continuous, cryogen-free on-line monitoring of PAMS in ambient air using hydrogen carrier gas using EPA PAMS method.

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.

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