3b814 | — | Hydroxy-analogue of selenomethionine | - Characterisation of the additive
- Solid and liquid preparation of Hydroxy-analogue of selenomethionine
- Content of selenium: 18000 to 24000 mg Se/kg
- Organic selenium > 99 % of total Se
- Hydroxy-analogue of selenomethionine > 98 % of total Se
- Solid preparation: 5 % Hydroxy-analogue of selenomethionine and 95 % carrier
- Liquid preparation: 5 % Hydroxy-analogue of selenomethionine and 95 % distilled water
- Characterisation of the active substance
- Organic selenium from hydroxy-analogue of selenomethionine (R,S-2-hydroxy-4-methylselenobutanoic acid)
- Chemical formula: C5H10O3Se
- CAS number 873660-49-2
- Analytical method
- For the determination of hydroxy analogue of methionine in the feed additive:
- High performance liquid chromatography coupled to UV detection at 220 nm (HPLC-UV)
- For the determination of total selenium in the feed additive:
- Inductively coupled plasma mass spectrometry (ICPMS) after microwave digestion with HNO3/H2O2, or
- Inductively coupled plasma atomic emission spectrometry (ICPAES) after digestion with HNO3/HCl
- For the determination of total selenium in premixtures and feed:
- Hydride generation atomic absorption spectrometry (HGAAS) after microwave digestion with HNO3/H2O2 (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.Maximum supplementation with organic selenium:0,20 mg Se/kg of complete feed with a moisture content of 12 %.
| 4 June 2023 |