Record Display for the EPA National Library Catalog

RECORD NUMBER: 24 OF 133

OLS Field Name OLS Field Data
Main Title Comparison of Three Wet-Alkaline Methods of Digestion of Biogenic Silica in Water.
Author Krausse, G. L. ; Schelske, C. L. ; Davis, C. O. ;
CORP Author Michigan Univ., Ann Arbor. Great Lakes Research Div.;Environmental Research Lab.-Duluth, MN.
Year Published 1983
Report Number EPA-R-806294; EPA-600/J-83-117;
Stock Number PB84-128115
Additional Subjects Silicon dioxide ; Water analysis ; Sediments ; Chemical analysis ; Great Lakes ; Digestion(Decomposition) ; Extraction ; Water pollution ; Reprints ; Water pollution detection ; Natural emissions ; Wet methods
Holdings
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Status
NTIS  PB84-128115 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 12p
Abstract
Methods for determination of low levels of biogenic silica (0.2-0.4 mg SiO2) in aqueous samples after digestion with three wet-alkaline extraction procedures compared favourably in both precision of replicates and recovery of silica utilized by diatoms in budgeted cultures. Time-course experiments are recommended for establishing digestion times and determining the presence of mineral silicate interference. Wet-alkaline digestion methods are recommended for routine analysis of biogenic silica in suspended matter in preference to infra-red analysis, alkaline fusion and hydrofluoric acid/nitric acid methods.