Instruments for monitoring ozone-depleting substances and greenhouse gases Monitoring ozone-depleting substances (ODS) and halocarbon greenhouse gases (GHGs) is challenging due to their varying concentrations and ultra-volatility. Interference from water and CO2, along with the need for both laboratory and field measurements, adds to the complexity. Designed for scientists monitoring ODS and GHGs in air, Markes’ preconcentration instruments for GC–MS tackle these challenges. They enable the detection of key species in any environment, with method detection limits from ppm to sub-ppt. UNITY–CIA Advantage-xr This system is ideal for industrial monitoring, where concentrations can be in the range of 1 ppm to 1 ppb. UNITY–CIA Advantage-xr is a robust system that recovers excellently from accidental overloading with high-concentration samples. In addition, samples can be screened by introducing them through a gas sampling loop. NuVo 200 Designed for urban and industrial area monitoring, NuVo 200 offers detection limits below background levels for key species, with management of interferents (H2O, CO2). Plus, you can screen samples by introducing them through a gas sampling loop. Medusa Used globally by the Advanced Global Atmospheric Gases Experiment (AGAGE) network and National Oceanic and Atmospheric Administration (NOAA), the Medusa system has a proven record for monitoring of background fluctuations in ODS and GHGs. Medusa is designed by the Scripps Institution of Oceanography (SIO) AGAGE laboratory, and built by Ma

How Markes’ instruments can help Flexible – adapting to different monitoring needs Diverse monitoring locations and monitoring ultra-volatile species require different instrument features; no single instrument is ideal for every situation. Picking the correct instrument for the challenge ensures the best data: ■ Large sample volumes for background monitoring Sample screening for samples from industrial and urban areas, avoiding system contamination before it happens. Reliable – managing interferents Interference from CO2 and water will impact data quality, instrument reliability and performance,...