Occurrence modules

The basic occurrence data are concentrations for substances in foods, sometimes specified separately for a focal food as focal food concentrations. In some cases concentration limits are used as a stand-in when data are missing.

Concentration data are recalculated (if needed) as active substance concentrations in modelled-foods. If substance concentrations are not specified directly for the active substances, then they are converted using substance conversions and/or specified authorised occurrence patterns. The composition of mixed samples in total diet studies is described in total diet study sample compositions. Food extrapolation rules specify if insufficient data for a food can be suppleted with data from another food. From these basic data the list of modelled-foods is derived.

Active substance concentrations in modelled-foods are modelled in concentration models, optionally allowing for occurrence pattern models. In addition, processing factors and unit variability factors can be provided for further use in dietary exposure assessment.

• Concentration distributions
• Concentration limits
• Concentration models
• Concentrations
• Deterministic substance conversion factors
• Focal food concentrations
• Food extrapolations
• Modelled foods
• Occurrence frequencies
• Occurrence patterns
• Processing factors
• Single value concentrations
• Substance authorisations
• Substance conversions
• Total diet study sample compositions
• Unit variability factors