3b816 | — | DL-selenomethionine | Characterisation of the additiveSolid preparation of DL-selenomethionine with a selenium content of 1800 mg/kg to 2200 mg/kgCharacterisation of the active substanceOrganic selenium in form of DL-selenomethionine ((RS2)-2-amino-4-methylselenylbutanoic acid) from chemical synthesisChemical formula: C5H11NO2SeCAS number: 2578-28-1Powder with minimum 97 % DL-selenomethionineAnalytical methodFor the determination of DL-selenomethionine in the feed additive: high performance liquid chromatography with UV detection (HPLC-UV).For the determination of total selenium in the feed additive: inductively coupled plasma mass spectrometry (ICP-MS), or inductively coupled plasma atomic emission spectrometry (ICP-AES).For the determination of total selenium in premixtures, compound feed and feed materials: hydride generation atomic absorption spectrometry (HGAAS) after microwave digestion (EN 16159:2012). | All species | — | | 0,50 (total) | 1.The additive shall be incorporated into feed in the form of a premixture.2.For user safety: breathing protection, safety glasses and gloves should be worn during handling.3.Technological additives or feed materials included in the preparation of the additive shall ensure a dusting potential < 0,2 mg selenium/m3 air.4.In the directions for use of the additive and premixtures, indicate the storage and stability conditions.5.If the preparation contains a technological additive or feed materials for which a maximum content is set or which is subject to other restrictions, the feed additive manufacturer shall provide this information to the customers.6.Maximum supplementation with organic selenium: 0,20 mg Se/kg of complete feed with a moisture content of 12 %. | 25 August 2024 |