Record Display for the EPA National Library Catalog
RECORD NUMBER: 29 OF 153Main Title | Comparison of the EC50s of Algal Toxicity Tests Calculated by Four Methods. | |||||||||||
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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 ; | |||||||||||
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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. |