Record Display for the EPA National Library Catalog


Main Title Interlaboratory Precision Test. An Eight Laboratory Evaluation of the Provisional Algal Assay Procedure Bottle Test.
Author Weis, Charles M. ; Helm, Ronald W. ;
CORP Author North Carolina Univ., Chapel Hill. Dept. of Environmental Sciences and Engineering.
Year Published 1971
Report Number EPA-16010-DQT;
Stock Number PB-230 344
Additional Subjects Algae ; Biological productivity ; Selenastrum capricornutum
Library Call Number Additional Info Location Last
NTIS  PB-230 344 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 82p
In order to establish the validity of an algal assay procedure for the determination of algal nutrient levels in surface waters a suitable protocol was designed and followed by eight laboratories. This group consisted of one government laboratory, four university laboratories and three industrial laboratories. The basic procedure was to evaluate by use of the 'bottle' or batch test the precision and reproducibility of the growth response of one test organism, Selenastrum capricornutum, in four media of varying nutrient strength. The medium was originally defined for the PAAP test and modified slightly in subsequent evaluations. The test media of this experiment were all dilutions of the PAAP medium.