Dataset

Diffusive Gradients in Thin Films (DGT) Methodology for Selective and Spatially Discriminating Binding of Metal Ions

Australian Antarctic Data Centre
HADAAD, PAUL
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://data.aad.gov.au/metadata/records/ASAC_2665&rft.title=Diffusive Gradients in Thin Films (DGT) Methodology for Selective and Spatially Discriminating Binding of Metal Ions&rft.identifier=https://data.aad.gov.au/metadata/records/ASAC_2665&rft.publisher=Australian Antarctic Data Centre&rft.description=Metadata record for data from ASAC Project 2665 See the link below for public details on this project. The Antarctic environment with its harsh climatic conditions, minimal human activity and its unique ecosystems is unlike any of the World's other environments. As such, it is important that an understanding of the Antarctic environment is developed in order to gain a full appreciation of the impacts of human activities in Antarctica and to determine the most effective means to remediate and protect the Antarctic environment. To achieve these goals, new sensitive and selective techniques for sampling metal contaminant levels in marine sediments are being developed. The project is not an environmental study of the Antarctic environment (ie no metal concentrations in water or sediments), but rather the development of an analytical technique for use in Antarctica. We are still in the process of developing this technique and much of the development phase has involved qualitative assessment rather than generating quantitative data. We are currently trialling the technique in the lab and will conduct field trials in the Derwent Estuary. Taken from the abstract of the referenced paper: A novel binding phase was developed for use in diffusive gradients in thin-film (DGT) sampling for Cu(II) by employing methylthymol blue as a chelating and chromogenic agent. Methylthymol blue was adsorbed onto beads of Dowex 1x8 resin (200-400 mesh) and the resin beads were then immobilised onto an adhesive disc. Analysis of exposed binding discs by either UV-vis spectrophotometry or computer imaging densitometry provided robust quantification of adsorbed Cu(II) in the 0.2-1 micro gcm-2 range, allowing detection at micro gL-1 concentrations in the test solution (ca. 17 micro gL-1 for a 24 h deployment), and in good agreement with established DGT theory. The method was shown to be a potential replacement for binding phases based on Chelex 100 where a colorimetric response to a specific metal is desired.&rft.creator=HADAAD, PAUL &rft.date=2006&rft.coverage=northlimit=-66.0; southlimit=-67.0; westlimit=110.0; eastLimit=111.0; projection=WGS84&rft.coverage=northlimit=-66.0; southlimit=-67.0; westlimit=110.0; eastLimit=111.0; projection=WGS84&rft.coverage=northlimit=-42.75; southlimit=-43.25; westlimit=147.0; eastLimit=147.5; projection=WGS84&rft.coverage=northlimit=-42.75; southlimit=-43.25; westlimit=147.0; eastLimit=147.5; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_2665 when using these data.&rft_subject=environment&rft_subject=oceans&rft_subject=EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC&rft_subject=CONTAMINANT LEVELS/SPILLS&rft_subject=EARTH SCIENCE&rft_subject=HUMAN DIMENSIONS&rft_subject=ENVIRONMENTAL IMPACTS&rft_subject=MARINE ENVIRONMENT MONITORING&rft_subject=OCEANS&rft_subject=ION EXCHANGE&rft_subject=SOLID EARTH&rft_subject=GEOCHEMISTRY&rft_subject=GEOCHEMICAL PROCESSES&rft_subject=EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY&rft_subject=contaminants&rft_subject=benthic&rft_subject=heavy metals&rft_subject=thin films&rft_subject=diffusive gradients&rft_subject=SHIPS&rft_subject=LABORATORY&rft_subject=CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA&rft_subject=CONTINENT > ANTARCTICA&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_2665 when using these data.

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A pdf copy of the referenced paper is available for download to AAD staff only.

Brief description

Metadata record for data from ASAC Project 2665

See the link below for public details on this project.

The Antarctic environment with its harsh climatic conditions, minimal human activity and its unique ecosystems is unlike any of the World's other environments. As such, it is important that an understanding of the Antarctic environment is developed in order to gain a full appreciation of the impacts of human activities in Antarctica and to determine the most effective means to remediate and protect the Antarctic environment. To achieve these goals, new sensitive and selective techniques for sampling metal contaminant levels in marine sediments are being developed.

The project is not an environmental study of the Antarctic environment (ie no metal concentrations in water or sediments), but rather the development of an analytical technique for use in Antarctica. We are still in the process of developing this technique and much of the development phase has involved qualitative assessment rather than generating quantitative data. We are currently trialling the technique in the lab and will conduct field trials in the Derwent Estuary.

Taken from the abstract of the referenced paper:

A novel binding phase was developed for use in diffusive gradients in thin-film (DGT) sampling for Cu(II) by employing methylthymol blue as a chelating and chromogenic agent. Methylthymol blue was adsorbed onto beads of Dowex 1x8 resin (200-400 mesh) and the resin beads were then immobilised onto an adhesive disc. Analysis of exposed binding discs by either UV-vis spectrophotometry or computer imaging densitometry provided robust quantification of adsorbed Cu(II) in the 0.2-1 micro gcm-2 range, allowing detection at micro gL-1 concentrations in the test solution (ca. 17 micro gL-1 for a 24 h deployment), and in good
agreement with established DGT theory. The method was shown to be a potential replacement for binding phases based on Chelex 100 where a colorimetric response to a specific metal is desired.

Issued: 2006-07-27

Data time period: 2005-10-01 to 2008-03-31

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111,-66 111,-67 110,-67 110,-66 111,-66

110.5,-66.5

147.5,-42.75 147.5,-43.25 147,-43.25 147,-42.75 147.5,-42.75

147.25,-43

text: northlimit=-66.0; southlimit=-67.0; westlimit=110.0; eastLimit=111.0; projection=WGS84

text: northlimit=-42.75; southlimit=-43.25; westlimit=147.0; eastLimit=147.5; projection=WGS84

Subjects
CONTAMINANT LEVELS/SPILLS | CONTINENT > ANTARCTICA | CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA | EARTH SCIENCE | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY | ENVIRONMENTAL IMPACTS | GEOCHEMICAL PROCESSES | GEOCHEMISTRY | GEOGRAPHIC REGION > POLAR | HUMAN DIMENSIONS | ION EXCHANGE | LABORATORY | MARINE ENVIRONMENT MONITORING | OCEANS | SHIPS | SOLID EARTH | benthic | contaminants | diffusive gradients | environment | heavy metals | oceans | thin films |

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