Arsenic is generally present in the environment as arsenate (AsV) and to a lesser degree as arsenite
(AsIII), or the methylated compounds monomethylarsonate (MA) and dimethylarsinate (DMA)1,2,
whilst Ellwood et al (2003)3 reported the presence of arsenosugars (As-sugars) in lake sediments.
Measurement of individual arsenic (As) species provides valuable information on the varied toxicity
of inorganic and organic forms of As. AsIII is considered the most toxic and mobile of As species in
soil and sediment. Information regarding the chemical forms (species) of As is useful to understand
possible mobilisation from sediment into aqueous phase, since soil and sediments cannot be isolated
from geochemical cycles4. The aim of this work was to determine total and measurable arsenic
species in the mobilisable fraction of 36 sediment cores from the Thames estuary using a phosphoric/
ascorbic acid extraction, followed by HPLC-ICP-MS analysis5
Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.