Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Ion and Temperature Dependence of Electrical Conductance for Natural Waters.
Author Sorensen, J. A. ; Glass, G. E. ;
CORP Author Minnesota Univ.-Duluth. Dept. of Chemistry.;Environmental Research Lab.-Duluth, MN.
Year Published 1987
Report Number EPA-R-809412; EPA/600/J-87/138;
Stock Number PB88-148200
Additional Subjects Electrical resistance ; Water quality ; Temperature ; Ion density(Concentration) ; Aqueous electrolytes ; Empirical equations ; Lakes ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB88-148200 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 6p
Four empirical equations describing the temperature dependence of electrical conductance of aqueous solutions are compared for the case of single electrolytes. The best method uses a modified Walden product where the log of the ratio between the conductances at two temperatures is assumed to be proportional to the log of the corresponding ratio of viscosities, that is, log (X(sub t sub 1)/X(sub t sub 2)) = K log (eta (sub t sub 2)/eta (sub t sub 1)). A basis for predicting the constant of proportionality for mixed systems given the ion concentrations is proposed and the dependence of ionic strength effects and ion association is discussed. The value of K may also be estimated from the hydrogen ion concentration (in micromoles per liter) where K = 0.941 - 0.00639(H(1+)) as found by regression of data for 692 lakes. A case study of time trend data for lakes is presented. (Copyright (c) 1987 by the American Chemical Society.)