Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Effects of Hardness, Alkalinity and pH on the Toxicity of Pentachlorophenol to 'Selenastrum Capricornutum' (Printz).
Author Smith, P. D. ; Brockway, D. L. ; Stanch, F. E. ;
CORP Author Environmental Research Lab., Athens, GA.
Year Published 1987
Report Number EPA/600/J-87/272;
Stock Number PB88-180369
Additional Subjects Toxicology ; Culture media ; Alkalinity ; pH ; Reprints ; Selenastrum capricornutum ; PCP ; Pentachlorophenol
Library Call Number Additional Info Location Last
NTIS  PB88-180369 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/04/1988
Collation 12p
The toxicity of pentachlorophenol (PCP) to Selenastrum capricornutum was examined in three different culture media: a hard and a soft form of Freeman's reference water and the algal assay bottle test (AABT) medium (a soft water). The 96-h growth potentials of the media were equal (28-29 mg/L dry wt.) but 96-h EC50s ranged sevenfold: 0.11 mg/L (AABT), 0.15 mg/L (Freeman's soft water) and 0.76 mg/L (Freeman's hard water). Culture media equilibrium pH and 96-h EC50s were strongly correlated (r=1.00). Evidence is presented that supports the hypothesis that the toxicity of PCP, a weak acid, is due primarily to the concentration of the undissociated species.