Journal ArticleDOI
A method for the collection, handling, and analysis of trace metals in precipitation.
Reads0
Chats0
TLDR
A comparison of the results obtained by this method with earlier published trace metal results suggest that serious sampling and analytical artifacts may be present in most earlier data bases.Abstract:
A method is described for the automated collection, proper handling, and accurate analysis of trace metals (Fe, Zn, Cu, Mn, Pb, Cd, Ni, V) in precipitation. The method has been successfully used in both rural coastal (Lewes, DE) and semiremote (Bermuda) marine environments but should be generally applicable. The collection device is a commercially modified automatic collector with polyethylene bag liners in the collecting buckets. Strict protocols for acid washing, deployment, and blanking are necessary to ensure accurate contamination-free samples. The freshly collected event samples are postacidified below pH 1.6 with ultraclean HCl to ensure desorption and preservation of the sample. Trace metal concentrations are quantitatively analyzed by heated graphite atomization in an atomic absorption spectrophotometer. A comparison of the results obtained by this method with earlier published trace metal results suggest that serious sampling and analytical artifacts may be present in most earlier data bases. 24 references, 5 table.read more
Citations
More filters
Journal ArticleDOI
Oxidation of arsenite in groundwater using ozone and oxygen.
Myoung-Jin Kim,Jerome O. Nriagu +1 more
TL;DR: Investigation of arsenite oxidation with ozone and oxygen in groundwater samples found that iron and manganese in the samples were also oxidized and, by sequestering the resultant As(V), played a significant role in the rate of reaction.
Journal ArticleDOI
Peat bog archives of atmospheric metal deposition: geochemical evaluation of peat profiles, natural variations in metal concentrations, and metal enrichment factors
TL;DR: The objectives of this review are to outline some of the geochemical characteristics that can be used to establish the existence of an ombrotrophic zone, provide examples of variations in bulk density and mineral matter contents and show how this can affect metal concentration profiles.
Journal ArticleDOI
Atmospheric inputs of metals and nutrients to the oceans: their magnitude and effects
TL;DR: In this article, the estimates of atmospheric inputs of metals and nutrients to the oceans and some coastal areas are reviewed and the uncertainties in these estimates considered The evidence that these inputs significantly modify oceanic chemistry is presented However, there are still major uncertainties in our understanding of the interactions between the atmosphere and the ocean for these elements.
Journal ArticleDOI
Chromium speciation in rainwater: Temporal variability and atmospheric deposition
TL;DR: Using rainwater concentration data along with other published rainwater Cr concentrations and an estimate for total global annual rain, the total global flux of chromium removed from the atmosphere via wet deposition is 2.1 x 10(9) mol/yr, indicating that essentially all chromium released into the global atmosphere is removed via rain.
Journal ArticleDOI
A Protocol for Minimizing Contamination in the Analysis of Trace Metals in Great Lakes Waters
TL;DR: The precautions and procedures aimed at minimizing contamination artifacts during the collection, filtration, and analysis of trace metals in fresh water are described in this article, and the techniques for proper decontamination of sample containers and labware and for field blanks are also presented.