Chromatography
Real-time Determination of Anions and Cations in Aerosols by Ion Chromatography
Dec 11 2008
Research on air pollution requires rapid and accurate measurements of inorganic species in ambient air. Coupling a Particle-Into-Liquid-Sampler (PILS) to Metrohm`s 850 Professional IC allows for quasi-continuous measurements with an unprecedented temporal resolution of just 5 to 15 minutes.
The determination of anions and cations in atmospheric aerosols yields essential information concerning atmospheric transport and transformation processes. Until now these determinations have been carried out using filters. However, this method only allows one to determine averages over a time span of 24 hours or even more. Moreover, the results can be compromised by desorption processes and chemical transformations.
In contrast to sampling devices relying on filters, using a PILS allows semi-continuous sampling of aerosols downstream from a denuder system.
Subsequent to the removal of interfering gas-phase species, the remaining aerosol particles are dissolved into water phase by means of
supersaturated steam. Eventually, the liquid sample is transported to the IC for analysis. The key benefit of this method is a high temporal resolution of measurements of just 5 to 15 minutes. Changes in the ionic composition of ambient air can thus be recorded almost immediately allowing a much more precise correlation with meteorological and other data.
Digital Edition
ILM 49.5 July
July 2024
Chromatography Articles - Understanding PFAS: Analysis and Implications Mass Spectrometry & Spectroscopy Articles - MS detection of Alzheimer’s blood-based biomarkers LIMS - Essent...
View all digital editions
Events
Jul 28 2024 San Diego, CA USA
Jul 30 2024 Jakarta, Indonesia
Jul 31 2024 Chengdu, China
ACS National Meeting - Fall 2024
Aug 18 2024 Denver, CO, USA
Aug 25 2024 Copenhagen, Denmark