In reviewing the various options available for formal clearance of a new food contact substance through U.S. Food and Drug Administration, each of the available mechanisms depends on a measure of the dietary exposure of the food contact substance.
The analytical verification of gluten-free claims on all ingredients derived from gluten-containing grains is required to ensure compliance with federal regulations.
The best approach to protect your product from chemical contamination is to identify the hazards in your ingredients before they can affect your final product.
Science-based harmonization of food safety standards, especially those related to food additives, would have avoided this contamination incident altogether.