On-line and off-line quantification of trace elements associated to colloids by As-Fl-FFF and ICP-MS
Résumé
A quantification procedure of trace elements during colloid size fractionation was developed and validated. This procedure is based on the hyphenation between Asymmetrical Flow Field-Flow Fractionation (As-Fl-FFF) and Inductively Coupled Plasma Mass Spectrometer (ICP-MS). The optimisation of the procedure was performed on a soil leachate spiked with six trace elements selected for their environmental and health impact (As, Cd, Sb, Se, Sn and Pb). The elements in the spiked sample were on-line monitored during the fractionation. The validation was carried out by comparison with a second off-line quantification procedure based on fraction collection and total element analysis by ICP-MS. This off-line one was previously validated using reference materials. Finally, the analytical performances of the two procedures were compared. © 2008 Elsevier B.V. All rights reserved.
Mots clés
Agricultural chemicals
Chemical elements
Colloid chemistry
Colloids
Environmental impact
Fractionation
Inductively coupled plasma
Inductively coupled plasma mass spectrometry
Leaching
Lead
Liquid chromatography
Mass spectrometers
Mass spectrometry
Photoresists
Radioactive elements
Tin
Trace analysis
Analytical performances
Analytical validation
Asymmetrical flow field
Colloid size
Element analysis
FFF
Fraction collection
Health impacts
ICP-MS
Inductively coupled plasma mass spectrometer
Natural colloids
Optimisation
Quantification
Reference materials
Soil leachate
Trace elements