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Abstract
The retention characteristics of condensed linear phosphates, P 2 to P 13, on strongly basic quaternary amine anion exchanger were studied. A single-column chromatographic system with indirect UV detection was tested, dependencies of the polyphosphates' retention on the concentrations of pyromellitic acid and EDTA in the mobile phase and on the pH of the eluent were investigated. A linear relationship between the logarithm of the capacity ratios and the number of phosphorus atoms in a phosphate molecule was found, which can be used for identification of long-chain linear polyphosphates, as standards are not available. Mixtures of glassy sodium-potassium condensed phosphates were separated under optimum isocratic conditions.
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