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Table T13. Nominal concentrations and acceptable 2% limits in IAPSO seawater for sodium, potassium, magnesium, calcium, chloride, and sulfate by ion chromatography, Expedition 317.

Analyte Concentration
(mM)
2% error
acceptable range
(mM)
Sodium 480 470.4–489.6
Potassium 10.44 10.23–10.65
Magnesium 54 52.92–55.08
Calcium 10.55 10.34–10.76
Chloride 559 547.82–570.18
Sulfate 28.9 28.32–29.48

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