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New NIST sediment SRM for inorganic analysis
1Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive Stop 8395, Gaithersburg, MD 20899-8395, USA. rolf.zeisler@nist.gov
Analytical and Bioanalytical Chemistry
|January 22, 2004
Summary
NIST developed a new marine sediment standard reference material (SRM 2702) for accurate environmental analysis. This certified material ensures reliable measurements of organic and inorganic compounds, aiding in pollution monitoring.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Materials Science
Background:
- National Institute of Standards and Technology (NIST) offers over 1300 Standard Reference Materials (SRMs).
- A significant portion of NIST SRMs supports biological and environmental measurements.
- Continuous renewal of SRMs is essential for evolving analytical needs.
Purpose of the Study:
- To describe the development and certification of a new marine sediment SRM.
- To detail the characterization of SRM 2702 for inorganic constituents.
- To ensure the material's suitability for accurate environmental monitoring.
Main Methods:
- Sample preparation and homogeneity assessment using neutron activation analysis.
- Analytical characterization involving multiple laboratories and techniques.
- Statistical analysis using a Bayesian model for value assignment.
Main Results:
- SRM 2702 demonstrated high homogeneity, suitable for solid sampling.
- Certified values for 25 elements, reference values for 8, and information values for 11 elements were established.
- Small relative uncertainties (several percent) were achieved for priority pollutants.
Conclusions:
- SRM 2702 provides a reliable standard for inorganic analysis in marine sediments.
- The material exhibits high commutability, validated through interlaboratory comparisons.
- This new SRM enhances the accuracy of environmental measurements and pollution assessment.