Occurrence frequencies

Occurrence frequencies specify how often substances occur on foods. Frequencies are expressed as percentages.

This module has as primary entities: Foods Substances

Output of this module is used by: Concentration models Single value dietary exposures

Occurrence frequencies as data

Occurrence frequencies are described by one table, specifying for a food and substance the associated occurrence frequency as percentage.

• Occurrence frequencies data formats

Inputs used: Active substances

Calculation of occurrence frequencies

Occurrence frequencies for a food and substance are computed according to the model that is part of the EC 2018 Tier II definition (see van Klaveren et al. 2019)

• Occurrence frequencies calculation

Inputs used: Occurrence patterns

Settings and Tiers

• Occurrence frequencies settings
  • Selection settings