Porewater concentrations of ammonium, nitrite, nitrate, sulfate, hydrogen sulfide, dissolved iron and dissolved manganese at 5 sites along a water depth transect in the Gulf of Mexico (Louisiana continental shelf)

10.1594/PANGAEA.945061Lenstra, Wytze KWytze KLenstra0000-0003-0979-5594Porewater concentrations of ammonium, nitrite, nitrate, sulfate, hydrogen sulfide, dissolved iron and dissolved manganese at 5 sites along a water depth transect in the Gulf of Mexico (Louisiana continental shelf)PANGAEA2022Event labelDEPTH, sediment/rockDepth, top/minDepth, bottom/maxAmmoniumNitriteNitrateSulfateHydrogen sulfideIron, dissolvedManganese, dissolvedSurface water samplesee description in data abstractIon chromatographyInductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES)64PE434_NICO_Leg7PelagiaDataset10.3389/fmars.2022.811953839 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalPorewater samples for NH4+, NO3- , and NO2- were analyzed on board with Quattro gas-segmented continuous flow analysers using the indophenolblue method (NH+4), and the sulphanyl-amide method (NOx). Porewater sulfide was determined spectrophotometrically using phenylenediamine and ferric chloride. Porewater samples for SO4 2- were analyzed by ion-chromatography. Dissolved Fe and Mn were analyzed by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES; Spectro Arcos). Porewater concentrations were around or below the detection limit (0.5 and 0.8 μmol L−1, respectively) and are therefore not presented.-91.33724999999998-91.2252500000000227.73693328.8091Gulf of Mexico