Total soluble and insoluble sulfur concentrations in urban snow

Total soluble and insoluble sulfur concentrations in urban snow collected around Montreal, Canada, were measured. Proton-induced X-ray emission techniques, neutron activation analysis, and induced-coupled plasma spectrometry methods were employed. The use of a Nucleopore filter revealed that 85-90% of S was water soluble. The average total concentration was about 1500 Mgg s/l of snow. Enrichment factor values strongly indicate that S arises predominantly from anthropogenic sources.