Record Display for the EPA National Library Catalog
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.|
|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 ;|
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.