3b818i | Zinc-L-selenomethionine | Characterisation of the additiveSolid preparation of Zinc-L-selenomethionine with a selenium content of 40-46 g/kgCharacterisation of the active substanceOrganic selenium in form of zinc L-selenomethionineChemical formula: C5H10ClNO2SeZnCrystalline powder with:- L-selenomethionine > 62 %;
- selenium > 24,5 %:
- zinc > 19 %; and
- chloride > 20 %
Analytical methods:For the determination of selenomethionine in the feed additive:- high performance liquid chromatography with fluorescence detection (HPLC-FLD)
For the determination of total selenium in the feed additive:- inductively coupled plasma-atomic emission spectrometry (ICP-AES);
or- inductively coupled plasma-mass spectrometry (ICP-MS)
For the determination of total selenium in premixtures and compound feed:- hydride generation atomic absorption spectrometry (HGAAS) after microwave digestion – EN 16159; or
- inductively coupled plasma-mass spectrometry (ICP-MS) – EN 17053
For the determination of total zinc in the feed additive:- inductively coupled plasma-atomic emission spectrometry (ICP-AES) – EN 15510; or
- inductively coupled plasma-atomic emission spectrometry after pressure digestion, (ICP-AES) – EN 15621; or
- atomic absorption spectrometry (AAS) – ISO 6869
| All species | — | — | 0,50 | - 1.In the directions for use of the additive and premixtures, the storage conditions and the stability to heat treatment shall be indicated.
- 2.The additive shall be incorporated into feed in the form of a premixture.
- 3.For users of the additive and premixtures, feed business operators shall establish operational procedures and organisational measures to address the potential risks resulting from their use. Where those risks cannot be eliminated by such procedures and measures, the additive and premixtures shall be used with personal breathing and skin protective equipment.
- 4.Maximum supplementation with organic selenium: 0,20 mg Se/kg of complete feed with a moisture content of 12 %
| 8 January 2035 |