Record Display for the EPA National Library Catalog

RECORD NUMBER: 170 OF 278

Main Title Method Study 2: Nutrient Analyses, Manual Methods.
CORP Author Federal Water Pollution Control Administration, Cincinnnati, Ohio. Analytical Quality Control Lab.
Year Published 1970
Stock Number PB-230 828
Additional Subjects Chemical analysis ; Nutrients ; Nitrogen ; Phosphorus ; Accuracy ;
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=94000SMF.PDF
Holdings
Library Call Number Additional Info Location Last
Modified		 Checkout
Status
NTIS  PB-230 828 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 73p
Abstract
Interlaboratory studies were conducted on selected chemical methods of analysis for ammonia nitrogen, nitrate nitrogen, Kjeldahl nitrogen or organic nitrogen, orthophosphate and total phsophorus. Samples were prepared in pairs at similar yet different concentrations for each constituent. Analysts added an aliquot of each concentrate to distilled water and to a natural water of their choice. Single analyses were made on the distilled and natural water samples with and without added increments. Recoveries were compared and the bias of the method, the interference of natural water samples and the relative precision of each analyst and laboratory were determined.