(9)The analytical method laid down in Implementing Regulation (EU) 2020/997 concerning the quantification of L-lysine, base, liquid, in premixtures, compound feed and feed materials refers to the provisions of an annex to Commission Regulation (EC) No 152/2009note. However, as a result of amendments brought to Regulation (EC) No 152/2009, reference to such specific provisions is no longer appropriate. Taking into account that Regulation (EC) No 152/2009 may still be the subject of future amendments based on scientific and technological developments, the relevant analytical method should only refer to Regulation (EC) No 152/2009 as a whole. For the same reason, the reference to Regulation (EC) No 152/2009 should be adapted similarly as regards the analytical method for the additive L-lysine monohydrochloride, technically pure and the additive L-lysine sulphate, which are also included in the Annex to Implementing Regulation (EU) 2020/997.