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首页> 外文期刊>Geostandards and geoanalytical research >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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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

机译：电感耦合等离子体原子发射光谱法测定海水中钙，钠，钾和镁的浓度：在IAPSO海水参考物质，热液和合成海水溶液中的应用

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摘要

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 r_K (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 r_(Na), r_(Ca) and r_(Mg) 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.
机译：我们报告了一种测量程序，可通过电感耦合等离子体原子发射光谱法同时确定海水衍生溶液的主要阳离子浓度（Na，Ca，K和Mg）。用Milli-Q〜将IAPSO（“标准”）海水参比物质稀释30倍后，可获得最佳结果。水。我们获得了IAPSO海水的平均参考值r_K（钾与氯的质量分数之比，即（g kg-1）/（g kg-1）），为0.0205±0.0006（2.9％RSD），文献报道的海水成分与0.0206±0.0005（2.4％RSD）没有显着差异。测得的Na，Ca和Mg浓度分别对应于r_（Na），r_（Ca）和r_（Mg）值分别为0.5406±0.0026（0.5％RSD），0.02192±0.00048（2.2％RSD）和0.06830±0.00047（0.7％ RSD）分别与先前通过湿化学和原子吸收分光光度法或湿化学滴定法测得的值一致。我们的测量程序已成功用于合成海水溶液和高温热液。

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