Exchange properties of ammonium salts of 12-heteropolyacids—V. Sorption of alkali metals on ammonium phosphomolybdatotungstate

Krtil, J.; Krivy, I.

doi:10.1016/0022-1902(63)80141-4

Cited by 11 publications

(2 citation statements)

References 7 publications

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“…Although the cation-exchange properties of the ammonium salts of some heteropoly acids have been known for over 50 years (4, 10,20,42,58,59), it has been only recently that microcrystalline aggregates of these inorganic salts have been used for the selective adsorption of alkali, alkaline earth, and some transition metals (34). The use of ammonium molybdophosphate (AMP) crystals for the separation of alkali metals has been described by Smit et al (54,55) and in recent United Kingdom Atomic Energy Agency reports (62).…”

Section: Sorptionmentioning

confidence: 99%

Preconcentration for trace analysis of sea waters

1967

Environ. Sci. Technol.

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The chemical characterization of seawaters by trace-element content usually requires selective preconcentration to produce samples suitable for analysis. Phase-distribution methods which have been used for this purpose are briefly reviewed. Evaporation of the water produces a solid sufficiently concentrated for highly sensitive neutron activation techniques. Liquid-solid and liquid-liquid phase distribution provide greater concentration factors and selectivity and are used in conjunction with less sensitive methods of analysis. A simple procedure involving coprecipitation with alkaline earth salts followed by solvent extraction of transition-metal dithiocarbamates is proposed for use aboard ships at sea. With this procedure, recoveries of manganese, iron, nickel, cobalt, US. Atomic Energy Commission. It was the subject of contributed paper number 83 at the Symposium on Trace Characterization Chemical and Physical, conducted by the National Bureau ofstandards, Gaithersburg, Md., October 3 to 7,1966. Reference to the work of Cyrus Feldman and T . C. Rains on the collection and flame photometric determination of cesium [Anal Chem. 36, 405-9 (1964)] was inadvertently omitted from the section on sorption and from Literature Cited.

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