Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Comparison of the EC50s of Algal Toxicity Tests Calculated by Four Methods.
Author Walsh, G. E. ; Deans, C. H. ; McLaughlin, L. L. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Year Published 1987
Report Number EPA/600/J-87/258;
Stock Number PB88-182423
Additional Subjects Tin ; Toxicity ; Algae ; Pesticides ; Concentration(Composition) ; Growth ; Organic compounds ; Inorganic compounds ; Graphic methods ; Population growth ; Statistical analysis ; Density(Mass/Volume) ; Interpolation ; Chemical analysis ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB88-182423 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/04/1988
Collation 7p
EC50s (calculated concentrations that would inhibit growth by 50%) of 21 pesticides in unicellular algal toxicity tests were calculated by straight-line graphical interpolation, moving average interpolation, probit analysis and the binomial method. EC50s of 18 tin compounds were calculated by graphical interpolation, moving average and probit methods. A total of 187 tests was analyzed. Values of the EC50 were essentially identical when calculated by each method, and it is concluded that straight-line graphical interpolation, the simplest and most rapid method, can be used to estimate relative toxic effect on algal population growth.