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Magnesium was estimated using a weight photometric titration procedure after chromatographic isolation of the magnesium. Chlorinity was estimated using weight titration with a fluorometric end point. Samples collected in the Sargasso Sea were analyzed, and temporal or depth variations of the magnesium-chlorinity ratios were within the analytical uncertainties of 0.05%. The mean value of the ratio was found to be 0.06626, which is discrepant from previous estimates by 1%.
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Carpenter et al. (1973) studied this question.
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