Zabel, Matthias (2022): Sequential extraction of P components (SEDEX) in sediment core M157_12-17, off Namibia [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.945664
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Abstract:
A 5-step sequential extraction scheme modified after Ruttenberg (1992), Schenau and De Lange (2000) and Küster-Heins et al., (2010) was used for the speciation of particulate P. Approximately 125mg freeze-dried sediment sample was successively washed with 25 ml of (1) 2 M NH4Cl (pH 7; 4 h; repeat 8 to 10 times), (2) CDB (citrate-dithionite-bicarbonate) buffer solution (pH 7.5; 8 h), (3) 1M sodium acetate buffer solution (pH 4; 6 h), (4) 1 M HCl (24 h) and (5) 1 M HCl (24 h) after ignition for 3 hours at 550 °C. The extracted P components include biogenic P in fish scales, bones and teeth that are mainly composed of hydroxyapatite (PHydap) from step 1, iron-bound P (PFe) from step 2, authigenic apatite (PAuthigenic) from step 3 typically corresponding to carbonate fluorapatite, detrital P (PDetrital) from step 4 and organic P (Porg) from step 5. The sum of these fractions gives the total P content (Ptotal). The P concentration of the solutions was determined by inductively coupled plasma optical emission spectrometry (ICP-OES) with a precision of < 5 %.
Supplement to:
Chuang, Pei-Chuan; Anderson, Chloe H; Kossack, Michael; Fabian, Jenny; Su, Chih-Chieh; Vosteen, Paul; Zabel, Matthias; Scholz, Florian; Schulz-Vogt, Heide N; Sommer, Stefan; Dale, Andrew W (2022): Nutrient turnover by large sulfur bacteria on the Namibian mud belt during the low productivity season. Frontiers in Marine Science, 9, 929913, https://doi.org/10.3389/fmars.2022.929913
Project(s):
Coverage:
Latitude: -23.000583 * Longitude: 13.868717
Date/Time Start: 2019-08-23T11:26:00 * Date/Time End: 2019-08-23T11:26:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.280 m
Event(s):
M157_12-17 * Latitude: -23.000583 * Longitude: 13.868717 * Date/Time: 2019-08-23T11:26:00 * Elevation: -149.0 m * Campaign: M157 (BUSUC 1) * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Zabel, Matthias | Geocode | |
| 2 | Phosphorus, hydroxyapatite | P hydap | mg/kg | Zabel, Matthias | ICP-OES | |
| 3 | Phosphorus, iron-bound | P Fe-bound | mg/kg | Zabel, Matthias | ICP-OES | |
| 4 | Phosphorus, authigenic | P auth | mg/kg | Zabel, Matthias | ICP-OES | |
| 5 | Phosphorus, detrital | P detr | mg/kg | Zabel, Matthias | ICP-OES | |
| 6 | Phosphorus, organic | P org | mg/kg | Zabel, Matthias | ICP-OES | |
| 7 | Phosphorus, total | TP | mg/kg | Zabel, Matthias | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
60 data points