Environmental Analysis

Learn an Effective Method for Monitoring Hydrocarbons and Polar VOCs

Do you face challenges monitoring PAMS hydrocarbons and polar VOCs at low ambient levels? This on-demand webinar outlines operating conditions for the PAMS autosampler/GC installed at the New York State Department of Environmental Conservation...

Monitoring SVOCs using thermal desorption

This application note summarises the features of Markes’ thermal desorption (TD) systems that allow them to offer excellent performance for the analysis of semi-volatile organic compounds (SVOCs), including long-chain hydrocarbons, PCBs,...

High-performance analysis of PAHs in air by TD–GC–MS

This study investigates the performance of Markes’ thermal desorption (TD) systems for the analysis of polycyclic aromatic hydrocarbons (PAHs) in air. 

A method validation and field study for the determination of trace-level phthalate esters in air using TD–GC–MS

This application note describes the performance of Markes’ thermal desorption (TD) systems for the GC–MS analysis of trace-level phthalates in air. 

Using thermal desorption for the quantitative analysis of long-chain hydrocarbons

This study investigates the ability of Markes’ thermal desorption (TD) systems to monitor semi-volatile organic compounds (SVOCs), using a wide range of n-alkanes (n-C16 to n-C44) as a model. 

Innovative Cryogen-free Ambient Air Monitoring of Trace-level Air Toxics at High Humidity

Markes International has produced an application note describing how a canister autosampler (using innovative cryogen-free water-removal technology) and thermal desorption–gas chromatography–mass spectrometry (TD–GC–MS) together allow the...

Online monitoring of atmospheric aerosols

Atmospheric aerosols exert a large but uncertain negative (cooling) radiative forcing on regional climate. Their chemical composition affects this climate forcing via aerosol hydroscopicity and consequential cloud interactions, as well as...

Cryogen-Free Analysis of Trace-Level EPA TO-15 ‘Air Toxics’ in Humid Air

Volatile organic compounds (VOCs) are primarily monitored using canisters in accordance with US EPA Method TO-15. However, analysis of these ‘air toxics’ is challenged by the ever-greater range of analytes and concentrations of interest, and by...

The Application of Thermal Desorption to Chemical Ecology

Markes International has produced an application note that provides an overview of the fundamentals of thermal desorption (TD) and compatible sampling techniques, as used for chemical ecology studies.

How to Achieve Effective Fractionation of Aliphatic and Aromatic Hydrocarbons in Petroleum Extracts

UCT has produced an application note describing the fractionation of aliphatic and aromatic hydrocarbons in petroleum extracts using UCT’s EPH silica gel SPE cartridges. The fractionation of the total extractable petroleum hydrocarbons (EPH) is...

Highly Efficient Monitoring of VOCs in Stack Emissions using TD-GC-MS

Markes International has produced an application note for the highly efficient monitoring of VOCs in stack emissions using sorbent tubes analysed by TD–GC–MS in accordance with European standard method CEN/TS 13649. The value of repeat analysis...

GC×GC–FID for Routine Analysis of Total Petroleum Hydrocarbons

SepSolve Analytical has produced an application note describing a flow-modulated GC×GC–FID system for the analysis of total petrochemical hydrocarbons (TPH) in environmental media.  The application note demonstrates how use of this system...

    

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