Abstract
Determinations of sodium, potassium, magnesium, calcium and strontium have been carried out on ca. 80 samples of water from the major oceans by means of the ion exchange method of Riley and Tongudai (1966). Within the limits of analytical error the ratios of the concentrations of sodium, potassium and strontium to chlorinity are constant; average values of 0.5567, 0.0206 and 0.4 · 10 −3 being found respectively. Greater variations than would have been expected from analytical error were found for the magnesium/chlorinity ratio (mean 0.06667), but they showed no correlation with depth or location. The average calcium/chlorinity ratio of water samples from depths in excess of 1,500 m was ca. 0.5% higher than that of surface samples. The above findings agree well with those of Cox and Culkin (1966) who used a different analytical scheme.
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