Record Display for the EPA National Library Catalog

RECORD NUMBER: 36 OF 37

Main Title Water Oxygen Demand No. 2. Study Number 21.
CORP Author Robert A. Taft Sanitary Engineering Center, Cincinnati, Ohio.
Year Published 1965
Report Number Pub-999-WP-26;
Stock Number PB-168 789
Additional Subjects ( Water pollution ; Test methods) ; ( Public health ; Water pollution) ; Chlorides ; Oxidation ; Mercury compounds ; Sulfates ; Statistical data ; Chemical Oxygen Demand
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-168 789 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 84p
Abstract
The study consisted of four samples which 74 participating laboratories were instructed to dilute to a specified volume and analyze by both the Standard Method for Chemical Oxygen Demand and by the Mercuric Sulfate modification. The results from this study indicate that the two procedures produce similar precision and accuracy when no interfering materials are present. When interferences due to high concentrations of chloride are present, the standard method will produce equal precision and accuracy only if the appropriate corrective techniques are applied. The Mercuric Sulfate modification is the method of choice for COD measurement since with less manipulation it effectively removes the interference due to chloride oxidation and is less time consuming. (Author)