Abstract
Summary The separation of the four alkali metal ions, Na + , K + , Rb + and Cs + , can be speeded up by an order of magnitude by applying the theory of chromatography. The separation can be performed in less than 25 min, the smallest resolution being 8.5. A liquid chromatograph for corrosive eluants, with radiometric flow detection, has been developed. The distribution coefficients of the alkali metal ions on a cation exchanger were determined at different pH values of the solution. It was found that the selectivity factors are independent of the pH. The parameters which determine the theoretical plate height, resolution and separation time are discussed.
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