OLS : Record

RECORD NUMBER: 45 OF 89

Main Title Interlaboratory Methods Comparison for the Total Organic Carbon Analysis of Aquifer Materials.
Author Powell, R. M.; Bledsoe, B. E.; Curtis, G. P.; Johnson, R. L.;
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK. ;Oregon Graduate Center, Beaverton. ;Stanford Univ., CA. ;Northrop Services, Inc./Environmental Sciences, Ada, OK.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/276;
Stock Number PB90-185133
Subjects Aquifers; Chemical analysis; Carbon; Graphs(Charts); Ground water; Oxidation reduction reactions; Reprints; Environmental transport; Total organic carbon; Interlaboratory comparisons
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB90-185133 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/15/1990
Collation 6p
Abstract The total organic carbon (TOC) content of aquifer materials has been found to have significant effects on the movement of pollutants in the subsurface environment. Accurate quantification of TOC is therefore of great importance to research in groundwater contamination. However, large discrepancies have been observed when laboratories employing different methods determine TOC on the same aquifer material. The study was undertaken to evaluate the extent of these differences and examine their causes. Five subsurface samples were distributed and analyzed for both total carbon and total organic carbon by several instrumental techniques at four laboratories. Results indicate that when the material is adequately prepared with regard to homogeneity and removal of carbonate minerals, reasonably comparable values are obtained for all the instruments used, with the exception of a wet oxidation technique that is insufficiently oxidizing. Trends in subsurface research indicate a need for methods with improved accuracy and precision to lower detection limits and increase reliability. (Copyright (c) 1989 American Chemical Society.)
Supplementary Notes Pub. in Environmental Science and Technology, v23 n10 p1246-1249 Oct 89. Prepared in cooperation with Oregon Graduate Center, Beaverton, Stanford Univ., CA., and Northrop Services, Inc./Environmental Sciences, Ada, OK.
NTIS Title Notes Journal article.
Title Annotations Reprint: Interlaboratory Methods Comparison for the Total Organic Carbon Analysis of Aquifer Materials.
Category Codes 68D; 99A
NTIS Prices PC A02/MF A01
Primary Description 600/15
Document Type NT
Control Number 011721498
Cataloging Source NTIS/MT
Origin NTIS
Type CAT