Abstract

The 10 isomeric naphthalene dicarboxylic acids have been eluted from a column of Dowex 1 anion exchange resin using potassium bromide 0–1 M. By comparison of their behaviour, it now seems possible that failure to observe these acids in the sub-humic acids of Lawson and co-workers may have been due to use of ions of strength insufficient for their elution.

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