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OLS Field Name OLS Field Data
Main Title Single-Laboratory Evaluation and Modification of U.S. EPA (Environmental Protection Agency) Methods 7470 and 7471 for the Determination of Mercury in Aqueous and Solid Hazardous Wastes (Journal Version).
Author Churchwell, M. E. ; Livingston, R. L. ; Sgontz, D. L. ; Messman, J. D. ; Beckert, W. F. ;
CORP Author Battelle Columbus Div., OH.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher c1988
Year Published 1988
Report Number EPA-68-03-3226; EPA/600/J-87/452;
Stock Number PB89-130389
Additional Subjects Chemical analysis ; Mercury(Metal) ; Hazardous materials ; Methodology ; Quality control ; Concentration(Composition) Atomic spectroscopy ; Reprints ; U.S. EPA
Holdings
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Status
NTIS  PB89-130389 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/14/1989
Collation 17p
Abstract The current U.S. Environmental Protection Agency (U.S. EPA) protocols for mercury determinations in aqueous and solid waste samples (SW-846 Methods 7470 and 7471) using recirculating cold-vapor atomic absorption spectrometry (CV-AAS) have been evaluated. The U.S. EPA protocols have been modified in a single-laboratory study to facilitate additional QC measures, to enhance detectability for low-level mercury concentrations, and to eliminate nonspecific vapor absorption interferences. Volumetric manipulations for additional QC measures, if required, are facilitated by performing the sample digestions in Erlenmeyer flasks rather than in the current Biochemical Oxygen Demand (BOD) reduction-aeration bottles. Instrument detectability is improved 10-fold by using a gas sparging bottle as a dedicated reduction-aeration vessel and a silver wool-amalgamation CV-AAS system operated in an open configuration. The on-line amalgamation thermal desorption process of the modified CV-AAS system eliminates interfering water and organic matrix vapors prior to the mercury absorption measurement. Good accuracy and precision have been obtained with the amalgamation CV-AAS system for the analyses of four reference sediment materials. (Copyright (c) 1988 Pergamon Press.)
Supplementary Notes Pub. in Environment International, v13 p475-489 1987. Sponsored by Environmental Monitoring Systems Lab., Las Vegas, NV.
NTIS Title Notes Journal article.
Title Annotations Reprint: Single-Laboratory Evaluation and Modification of U.S. EPA (Environmental Protection Agency) Methods 7470 and 7471 for the Determination of Mercury in Aqueous and Solid Hazardous Wastes (Journal Version).
Category Codes 68C; 68D; 99A
NTIS Prices PC A03/MF A01
Primary Description 600/07
Document Type NT
Cataloging Source NTIS/MT
Control Number 904115130
Origin NTIS
Type CAT