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Scanning Laser Ablation-ICP-MS Tracking of Platinum Group Elements in Urban Particles

Sebastien Rauch (Institutionen för Vatten Miljö Transport, Vattenprocessteknik) ; Greg Morrison (Institutionen för Vatten Miljö Transport, Vattenprocessteknik) ; Mariella Moldovan
The Science of the Total Environment Vol. 286 (2002), p. 243-251.
[Artikel, refereegranskad vetenskaplig]

While it has now been demonstrated that platinum group elements (PGE) are released from automobile catalysts into the environment, less is known about the form in which they are emitted and transported. Here we show that scanning laser ablation-inductively coupled plasma-mass spectrometry (scanning laser ablation-ICP-MS) can identify and track individual particles released from automobile catalysts present in environmental particulates and sediments. Particles with high PGE concentrations were found in the exhaust of gasoline and diesel vehicles equipped with catalytic converters. The PGE-Ce association in individual particles provides a definitive fingerprinting for tracking catalyst particles in environmental compartments, while relative PGE signal intensity is an indication of the catalyst type. Scanning laser ablation-ICP-MS of road and aquatic sediments revealed a few PGE containing catalyst particles and it was possible to identify catalyst types for the origin of these particles.

Nyckelord: Laser ablation, ICP-MS, Platinum group elements, Tracking, Automobile exhaust, Urban particles



Denna post skapades 2006-09-28.
CPL Pubid: 2329

 

Institutioner (Chalmers)

Institutionen för Vatten Miljö Transport, Vattenprocessteknik (2000-2004)

Ämnesområden

Miljöteknik

Chalmers infrastruktur