Critical assessment of platinum group element determination in road and urban river sediments using ultrasonic nebulisation and high resolution ICP-MS
Journal article, 2000

The platinum group elements (PGEs) are the active catalytic metals in automobile emission control systems (autocatalysts). The release of PGEs to the urban environment is known, but analysis is difficult at the low concentrations encountered in sediments, typically ng g-1. It is demonstrated that ultrasonic nebulisation with high resolution ICP-MS provides sufficient sensitivity for PGEs in most environmental samples. Molecular ion and doubly charged ion interference is a serious, often overlooked, difficulty for measurement of PGEs by ICP-MS. Interferences on Pt were resolved in HR-ICP-MS at a resolution of 10102 (dm/m); Hf being the main interference. A similar situation exists for Rh (interference from Pb2+, ArCu+, ArZn+), but background (pre autocatalyst) concentrations of Rh are difficult to establish due to SrO+ interference. SrO+ is a less significant contribution to the Rh signal for present day urban sediments. Interferences on Pd (YO+, SrO+, RbO+, ZrO+) remain, even in HR-ICP-MS, and mean that reported values of Pd in environmental samples should be treated with caution.

rhodium

interference

ICP-MS

palladium

platinum

high resolution

Author

Sebastien Rauch

Chalmers, Department of Water Environment Transport, Water Chemistry and Process Technology

Mikael Motelica-Heino

Greg Morrison

Chalmers, Department of Water Environment Transport, Water Chemistry and Process Technology

Olivier F.X. Donard

Journal of Analytical Atomic Spectrometry

0267-9477 (ISSN)

Vol. 15 4 329-334

Subject Categories

Other Environmental Engineering

Chemical Sciences

DOI

10.1039/a909100i

More information

Created

10/7/2017