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RECORD NUMBER: 12 OF 34

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
Subjects Electrical resistance; Water quality; Temperature; Ion density(Concentration); Aqueous electrolytes; Empirical equations; Lakes; Reprints;
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB88-148200 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 6p
Abstract 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.)
Supplementary Notes Pub. in Analytical Chemistry, v59 n13 p1594-1597 Jul 87. Sponsored by Environmental Research Lab.-Duluth, MN.
NTIS Title Notes Journal article.
Title Annotations Reprint: Ion and Temperature Dependence of Electrical Conductance for Natural Waters.
PUB Date Free Form c1987
Category Codes 68D; 99A
NTIS Prices PC A02/MF A01
Primary Description 600/03
Document Type NT
Control Number 808420106
Cataloging Source NTIS/MT
Origin NTIS
Type CAT


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