(13)In particular, the Commission should be empowered to amend the list of extraction solvents which may be used during the processing of the raw materials, of foodstuffs, of food components or of food ingredients, and the specification of their conditions of use and maximum residue limits, and to adopt specific purity criteria for extraction solvents and the methods of analysis necessary to verify compliance with the general and specific purity criteria as well as methods of analysis and sampling of extraction solvents in and on foodstuffs. Since those measures are of general scope and are designed to amend non-essential elements of this Directive, inter alia , by supplementing it with new non-essential elements, they must be adopted in accordance with the regulatory procedure with scrutiny provided for in Article 5a of Decision 1999/468/EC.