NEMI Method Summary

Method Summary Information

Method Number: 155.1 Media: ANIMAL TISSUE
Revision: March 1998
Method Source: National Oceanic and Atmospheric Administration (NOAA)
Analytes in this method
Subcategory: INORGANIC
Official Name: X-Ray fluorescence for the analysis of trace metals in marine animal tissues.
Descriptive Name Trace metals in marine animal tissues by X-ray fluorescence
Source Info: National Oceanic and Atmospheric Administration (NOAA)
National Status and Trends Program (NS&T;)
SSMC-4, N/SCI-1
1305 East West Highway
Silver Spring, MD 20910
Tel. 301-713-3028
Citation: Sampling and Analytical Methods of the National Status and Trends Program: 1993-1996 Update
990997
Brief Method
Summary:
 Sample preparation and analysis methods have been developed and refined that allow accurate and precise determination of major and trace elements in marine animal tissue samples. Sample preparation emphasizes homogenization and total digestion steps that minimize contamination. Analysis includes a full suite of quality assurance samples (emphasis on certified reference materials) in order to produce reliable data. These methods allow measurement of both background and elevated concentrations within NOAA's Status and Trends Program, permitting subtle temporal and spatial differences to be detected.
Scope And
Application:
 This method measures trace metals (at ug / g concentrations) in marine animal tissues.
Applicable
Conc Range:
 0.1-1000.0
Interferences: Spectral interferences may be minimized by sample dilution, use of an alternate analyte wavelength, or selective volatilization of the analyte. Non-spectral interferences may be detected and compensated for using the method of standard additions.
QC Requirements: The quality assurance / quality control requirements are initial calibration and continuing calibration checks, method blank analysis, surrogate compound analysis, matrix spike analysis, and reference sample analysis.
Sample Handling: Bivalves are hand-collected and shucked at the laboratory. Tissues are freeze-dried in Spex jars and homogenized using methacrylate balls in a Spex mixer/mill.
Max Holding Time:
 6 months (frozen)
Sample Prep Met NOAA TM #130
Relative Cost: $201 to $400
URL to obtain ordering information for this method:
http://nsandt.noaa.gov/publications/download_pdf/techmemo130.pdf
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