CIA Advantage-xr

China has phased out chlorofluorocarbons (CFCs) and is gradually phasing out hydrochlorofluorocarbons (HCFCs), while hydrofluorocarbons (HFCs), although not harmful to the ozone layer, have a potent greenhouse effect and were added to the Montreal Protocol in 2016. Markes International presents a quantitative analysis method for ozone-depleting substances (ODS) and halogenated greenhouse gases (GHGs) without cryogen, meeting detection limit and data quality requirements outlined by the China National Environmental Monitoring Centre. The analysis system includes a canister autosampler, water vapor removal device, thermal desorption instrument, and GC-MS analyzer in SIM mode, capable of monitoring samples with 100% relative humidity and analyzing 34 ODS and halogenated GHGs qualitatively and quantitatively.

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 poster describes the successful application of Markes’ innovative on- and offline method coupled with Agilent’s powerful GC–MSD, which combines sampling and analysis in a single run with a cycle time under one hour, ensuring consistent hourly monitoring of all compounds, even remotely.

This scientific poster describes the successful application of Markes' innovative on- and offline solutions, combining all compounds of interest into a single run with a cycle time under one hour, ensuring consistent hourly monitoring for all compounds, even remotely.

This application note describes cryogen-free sampling and analysis of PAMS ozone precursors and TO-15 air toxics in high-humidity environments, in compliance with new Chinese air-monitoring regulations. The use of Markes’ groundbreaking Dry-Focus3 preconcentration and water management technology results in excellent chromatographic peak shape at 100% humidity, whilst maintaining sample-to-sample cycle times below 60 minutes.

This study describes the sampling and analysis of a combined list of PAMS ozone precursors, TO-15 air toxics and OVOCs at high humidity, without the use of liquid nitrogen or other cryogen. The method described complies with the detection limit and data-quality requirements of Chinese EPA Method HJ 759 and the Chinese Environmental Air Volatile Organic Compound Monitoring Program. The use of Markes’ Dry-Focus3 preconcentration and watermanagement technology results in excellent chromatographic peak shape at 100% humidity, while maintaining sample-tosample cycle times below 60 minutes. The use of robust, field-proven dual-column/Deans switch technology in the GC oven allows FID analysis of highly volatile C2 and C3 hydrocarbons, with the remainder detected using a singlequadrupole mass spectrometer.

This application note describes the GC–MS analysis of trace-level ‘air toxics’ in humidified canister air, using Markes’ ground-breaking cryogen-free Dry-Focus3 pre-concentration technology. It shows that this system is able to detect 65 target compounds ranging from propene to naphthalene, with method detection limits as low as 0.7 pptv in SIM mode, making it compliant both with standard TO-15 methods, and with ‘trace TO-15’ methods stipulating lower detection limits.

This is a comprehensive guide to monitoring chemicals in the environment and the workplace using thermal desorption. It describes how thermal desorption can be used in air and water monitoring applications including detection of ‘air toxics’, mapping of environmental pollutants and assessing underground contamination. In each case, the guide directs you towards relevant application notes which describe the methods mentioned in detail. The guide also describes relevant analytical and sampling techniques and outlines the advantages of using thermal desorption for environmental monitoring.

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, including method detection limits as low as 4 pptv.

This is a comprehensive guide to using thermal desorption in the vehicle-manufacturing industry. The guide describes how thermal desorption can be applied to various applications in the industry including vehicle interior air quality monitoring, analysis of polycyclic aromatics hydrocarbons (PAHs) and detecting volatile carbonyl compounds, and directs you towards relevant application notes which describe the methods in detail. The guide also describes relevant analytical and sampling techniques and outlines the advantages of using thermal desorption in automotive studies.

In this video, Gavin Davies, discusses how scientists can get the best from their GC analysis, enabling them to discover more and deliver more across a wide range of applications.