Both a bulk-analytical and a micro-analytical technique were used to determine lead in standard particles and natural aerosols. The localization of lead within standard particles was successfully studied. Both techniques were able to discriminate between particles which were coated with lead and particles with a homogeneous lead(II) distribution. Total lead present in aerosols was successfully quantitatively determined with Differential Pulse Anodic Stripping Voltammetry (DPASV), X-Ray Fluorescence (XRF) and Graphite Furnace Atomic Absorption Spectrometry (GFAAS). The results from the different techniques are in good agreement. DPASV was also used to obtain information about the lability of lead associated with the aerosol particles. The observed potential shifts indicate that lead forms labile complexes with the chemical groups of aerosol particles. With Laser Microprobe Mass Analysis (LAMMA), information on single particle composition was obtained. Most particles were mixed salts of ammonium nitrate and ammonium sulphate, with variable content of metals (especially V and Pb).
|Number of pages||13|
|Journal||International Journal of Environmental Analytical Chemistry|
|Publication status||Published - 1994|