||Selection of the receiver electrolyte for the Donnan dialysis enrichment of cations /
Cox, James A. ;
Gray, T. ;
Yoon, K. S. ;
Kim, Y. T. ;
||Southern Illinois Univ. at Carbondale. Dept. of Chemistry and Biochemistry.;Environmental Research Lab., Athens, GA.
|| U.S. Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory,
Quantitative analysis ;
Ion exchange membrane electrolytes ;
Magnesium sulfates ;
Aluminum sulfate ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||5 pages : illustrations ; 28 cm
The Donnan dialysis of cations is typically performed with sulphonated ion-exchange membranes. Factors that govern the selection of the receiver electrolyte when such membranes are used are described. In terms of providing high enrichment factors that are similar for a variety of cations and constituting a medium that is compatible with various quantification methods, a mixture containing 0.2 M MgSO4 and 0.5 mM A12(SO4)3 at pH 1 is the recommended electrolyte. For use with cadmium and copper ion-selective electrodes, the pH is adjusted to 3.5-4 after the dialysis. For quantification with a lead ion-selective electrode, the receiver consists of the nitrate salts of Mg(III) and A1(III).
"Reprint article published in Analyst, 109(12):1603-1605, December 1984." "EPA/600/J-84/418." PB89-208854. Microfiche.