Abstract
Mercury(II) is collected from dilute hydrochloric acid solutions on anion-exchange paper disks; barium ions are collected on cation-exchange paper disks after separation by coprecipitation with lead chromate and dissolution of the precipitate in 1,2-diaminocyclohexanetetraacetic acid which also serves as masking agent. The disks are then subjected to x-ray fluorescence spectrometry. The method is satisfactory for mg kg −1 levels of the two ions in the presence of large amounts of sodium, calcium and magnesium ions (e.g., in synthetic sea water and Contrexeville water). Various procedural modifications are discussed.
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