ION-EXCHANGE METHOD FOR MEASUREMENT OF FREE (IONIZED) METAL-ION CONCENTRATIONS, ESPECIALLY IN BIOLOGICAL LIQUIDS - METHODOLOGY AND DETERMINATION OF (MG++)

  • 1 January 1977
    • journal article
    • research article
    • Vol. 36  (1) , 17-28
Abstract
A surface sulfonated polystyrene material is used as the "2-dimensional" cation exchanger. The sample volume is 1 ml. About 50 determinations can be performed within 1 h with a SE of .+-. (2-4)% in the optimal range of measurement. Advantages and disadvantages of the method compared with other ones are discussed. Free Mg2+ concentrations were measured in solutions containing PPi as well as Hb and compared with those determined by equilibrium calculation or ultrafiltration.

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