The EDANA Stewardship Programme Codex™ 

The Codex™ is composed of 3 elements

1. a list of chemicals potentially present as impurities at trace levels
2. guidance values, these are the levels not to be exceeded for each substance listed in the Codex
3. relevant test methods to determine the presence of substances at trace level and to check that the amount of possible trace impurities in products does not exceed the defined guidance values