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OAS accession Detail for 0291624
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| accessions_id: | 0291624 | archive |
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| Title: | Surface arsenic, antimony speciation, and alkaline phosphatase activity along with US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04, KN199-05 cruises in the subtropical N. Atlantic during 2010 (U.S. GEOTRACES NAT project) (NCEI Accession 0291624) |
| Abstract: | This dataset contains chemical and physical data collected on R/V Knorr during cruises KN199-04 and KN199-05 in the North Atlantic Ocean from 2010-10-20 to 2010-11-24. These data include arsenic. The instruments used to collect these data include Gas Chromatograph, GeoFish Towed near-Surface Sampler, and towed undulating vehicle. These data were collected by Gregory Cutter of Old Dominion University as part of the "U.S. GEOTRACES North Atlantic Transect (U.S. GEOTRACES NAT)" project and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2020-04-10. The following is the text of the dataset description provided by BCO-DMO: Surface transects for arsenic speciation, antimony speciation, and alkaline phosphatase activity Dataset Description: Data for the concentrations of the dissolved ( |
| Date received: | 20200410 |
| Start date: | 20101020 |
| End date: | 20101124 |
| Seanames: | North Atlantic Ocean |
| West boundary: | -79.882 |
| East boundary: | -16.047 |
| North boundary: | 35.16 |
| South boundary: | 16.921 |
| Observation types: | chemical, physical |
| Instrument types: | chromatograph, undulating towed profiler |
| Datatypes: | TOXIC METALS |
| Submitter: | |
| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
| Collecting institutions: | Old Dominion University |
| Contributing projects: | GEOTRACES |
| Platforms: | Knorr (316N) |
| Number of observations: | |
| Supplementary information: | Change History: Data were updated 3 January 2013 Please note that some US GEOTRACES data may not be final, pending intercalibration results and further analysis. If you are interested in following changes to US GEOTRACES NAT data, there is an RSS feed available via the BCO-DMO (http://www.bco-dmo.org/project/2066; scroll down and expand the "Datasets" section). Acquisition Description: Filtered (0.4 µm) water samples from the Geotraces surface tow-fish taken at discrete times into 500 mL Teflon FEP bottles, refrigerated, and analyzed within 24 hours of collection. Arsenic and antimony speciation determined using selective hydride generation, liquid nitrogen-cooled trapping, and then revolatilization and determination with gas chromatography/photoionization detection (Cutter et al., 1991; Cutter and Cutter, 2006). Calibration performed daily via the standard additions method, with a minimum of 4 additions of AsIII, AsV, MMAs, or DMAs depending on the analyses. The slope from the linear fit to these data was then applied to all samples for that day. Detection limits were 25 pmol/L for As(III) and As(III+V), and 50 pmol/L for MMAs and DMAs. Precision was better than 8% (relative standard deviation) for all As species. Alkaline phosphatase enzyme activity was measured using the fluorescence method of Ammerman (1993). |
| Availability date: | |
| Metadata version: | 1 |
| Keydate: | 2024-04-21 22:05:06+00 |
| Editdate: | 2024-04-21 22:05:43+00 |