The impact of COVID-19 lockdowns on New York City’s air quality: continuous, cryogen-free on-line monitoring of PAMS in ambient air using hydrogen carrier gas
Application Note 159
Helium is commonly used as a gas chromatography (GC) carrier gas but is a finite resource that is increasingly expensive and difficult to source. It must be extracted and stored before being shipped around the world, giving it a high carbon footprint. Hydrogen, on the other hand, is simple to generate on-site and on-demand using water and electricity, so seems to be the obvious environmentally friendly alternative.
This study demonstrates the advantages of using Markes’ Multi-Gas thermal desorption (TD) with GC and hydrogen carrier gas for the analysis of ozone precursors in air. Also presented is a case study and some new findings possible thanks to reduced traffic pollution during lockdown periods.