The IAEA Database

The revised database holds over 23 000 analyte values for 660 measurands and 1670 reference materials produced by 56 different producers, from 22 countries. The database is restricted to natural matrix materials (i.e. made from naturally occurring materials, excluding calibration standards manufactured from pure chemicals). Information has been extracted from the relevant certificates of analysis, information sheets, and other reports provided by the reference material producers. As a general rule, the authors have only included in the compilation reference materials for which a certificate of analysis or similar documentation is on file. Information included in the survey is on values for measurands determined in reference materials, producers, suppliers, the cost of the materials, the unit size supplied, and the recommended minimum weight of material for analysis, if available. The new searchable database has been designed to help analysts to select reference materials for quality assurance purposes that match as closely as possible, with respect to matrix type and concentrations of the measurands of interest and their samples to be analyzed see Table 8.3. 

The measurands of the matrices listed in Table 8.3 are divided into ii groups  

Stable isotopes Organo-metallic constituents Agrochemical contaminants Aliphatic and aromatic hydrocarbons Chlorinated hydrocarbons 

Organic compounds other than hydrocarbons and chlorinated substances Veterinary drugs and other toxins 

Food Products and Animal FeedstufFs including meat, milk and flour 135 

---