Calcium,Na, K and Mg Concentrations in Seawater by Inductively Coupled Plasma‐Atomic Emission Spectrometry: Applications to IAPSO Seawater Reference Material,Hydrothermal Fluids and Synthetic Seawater Solutions |
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| Authors: | Philippe Besson Jefferson Degboe Benjamin Berge Valérie Chavagnac Sébastien Fabre Gilles Berger |
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| Institution: | 1. Géosciences Environnement Toulouse GET UMR5563 (CNRS/UPS/IRD/CNES), Observatoire Midi‐Pyrénées, , FR‐31400 Toulouse, France;2. IRAP, Université de Toulouse, , FR‐31400 Toulouse, France;3. IRAP, CNRS‐Université Paul Sabatier, , FR‐31400 Toulouse, France |
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| Abstract: | We report a measurement procedure to determine simultaneously the major cation concentrations (Na, Ca, K and Mg) of seawater‐derived solutions by inductively coupled plasma‐atomic emission spectrometry. The best results were obtained when the IAPSO (‘standard’) seawater reference material was diluted by thirty times with Milli‐Q® water. We obtained an average reference value rK (the ratio of the mass fraction of potassium to that of chlorine, i.e., (g kg?1)/(g kg?1)) for IAPSO seawater of 0.0205 ± 0.0006 (2.9% RSD), not significantly different from 0.0206 ± 0.0005 (2.4% RSD) for seawater composition reported in the literature. The measured Na, Ca and Mg concentrations correspond to rNa, rCa and rMg values of 0.5406 ± 0.0026 (0.5% RSD), 0.02192 ± 0.00048 (2.2% RSD) and 0.06830 ± 0.00047 (0.7% RSD), respectively, in line with previous values measured by wet‐chemistry and atomic absorption spectrophotometry or wet‐chemical titration. Our measurement procedure was used successfully on synthetic seawater solutions and high‐temperature hydrothermal fluids. |
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| Keywords: | ICP‐AES
IAPSO
reference material major elements seawater hydrothermal fluids ICP‐AES
IAPSO
maté riaux de ré fé rence é lé ments principaux eau de mer fluides hydrothermaux |
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