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RECORD NUMBER: 5 OF 23

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 ;
Holdings
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NTIS  PB88-182423 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/04/1988
Collation 7p
Abstract
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.