Determination of cadmium and chromium in antarctic snow by means of high resolution ICP MS
The Italian expeditions in austral summers 1987-88 and 1988-89 collected samples, in an area surrounding the Italian base at Terra Nova Bay, to be analysed mainly in Italy. While determinations of heavy metals in seawater and snow were performed on these samples by GFAAS after preconcentration, the enrichment of snow samples was made by lyophilisation. Although the content of heavy metals in seawater agreed with literature data concerning oceanic water in the South Pacific, the concentration in snow was higher than that found in snow samples collected in remote areas of Antarctica. Possible explanations for this include contamination during analysis (in particular in the course of preconcentration) or in the course of sampling and anthropic activity connected with the Italian base. To clarify this question, procedures allowing analysis without preconcentration were investigated. Among them, in addition to the laser atomic fluorescence spectrometry, which was used for the determination of lead and cadmium, there is the high resolution ICP mass spectrometry (HR ICP MS), whose sensitivity is much higher than that of conventional ICP MS. Using this tool, the determination of chromium and cadmium in snow samples (taken from the 1989 -90 and 1990-91 campaigns in Antarctica) was attempted.
Bibliographic Reference: Paper presented: 2nd Meeting on Environmental Impact, Venezia (IT), May 26-28, 1992
Availability: Available from (1) as Paper EN 36871 ORA
Record Number: 199210796 / Last updated on: 1994-12-02
Original language: en
Available languages: en