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Database of natural matrix reference materials (NMRM) for organic constituents
1International Atomic Energy Agenc, Division of Human Health, Vienna, Austria. V.Iyengar@iaea.org
Fresenius' Journal of Analytical Chemistry
|July 14, 2001
Summary
The International Atomic Energy Agency
Area of Science:
- Analytical Chemistry
- Environmental Science
- Materials Science
Background:
- The International Atomic Energy Agency (IAEA) curates a comprehensive database of certified reference materials (CRM).
- This database includes nearly 25,000 measurands across 1,700 natural and anthropogenic materials.
- Organic constituents are categorized into five main groups: hydrocarbons (A), chlorinated hydrocarbons (B), pesticides (C), organometallic compounds (D), and other organic constituents (E).
Purpose of the Study:
- To analyze the composition and certification status of organic constituents in the IAEA's CRM database.
- To assess the availability and reliability of certified versus informational values for different analyte groups.
- To identify trends and potential gaps in the characterization of organic measurands in reference materials.
Main Methods:
- Database analysis of the IAEA's certified reference materials (CRM) inventory.
- Classification of organic analytes into five specified groups (A-E).
- Quantification of certified versus informational values for each analyte group and matrix type.
Main Results:
- The database covers over 2000 measurands for 420 organic analytes in 230 materials.
- A significant proportion of measurands are informational (32%), particularly for hydrocarbons (A), chlorinated hydrocarbons (B), and pesticides (C) (35%, 35%, 26% respectively).
- Organometallic compounds (D) and other organic constituents (E) show a lower percentage of informational values (10% and 22%), suggesting more targeted analytes and cohesive certification profiles.
Conclusions:
- The IAEA CRM database provides a valuable overview of organic constituent availability.
- A high percentage of informational values for certain organic analyte groups highlights a need for further certification efforts.
- The database serves as a useful indicator for the status of organic constituents in reference materials, despite variations in comprehensiveness.