Details
- Publication date
- 24 February 2015 (Last updated on: 3 July 2019)
Description
In the current application authorisation is sought under article 10(2) for sodium selenate under the category / functional group (3b) "nutritional additives"/"compounds of trace elements", according to the classification system of Annex I of Regulation (EC) No 1831/2003. Specifically, authorisation is sought for the use of the feed additive for all categories and species. The feed additive is a white powder containing at least of 98% of sodium selenate (Na2SeO4) based on anhydrous weight, which corresponds to a minimum content of 41% selenium and 24% sodium. The feed additive is intended to be incorporated into feedingstuffs through premixtures with maximum levels of 0.5 mg total selenium /kg feedingstuffs.
For the quantification of total selenium in the feed additive the Applicant suggested an assay based on the volumetric method of iodometric analysis. The EURL considers this method suitable for the official control.
For the quantification of total sodium in feed additive the EURL identified two ring-trial validated methods: - EN ISO 6869:2000, based on Atomic Absorption Spectrometry (AAS) after dilution in hydrochloric acid, and - EN 15510:2007, based on Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) after dilution in hydrochloric acid.
For the quantification of total selenium in premixture samples, the Applicant applied flame atomic absorption spectrometry (AAS) in the frame of homogeneity studies. Furthermore, the Applicant submitted for the quantification of total selenium in premixtures and feedingstuffs the EN 16159:2012 method, based on Hydride Generation Atomic Absorption Spectrometry (HGAAS) after microwave digestion with HNO3/H2O2. This method was already evaluated and recommended by the EURL in the frame of previous selenium dossiers.
Further testing or validation of the methods to be performed through the consortium of National Reference Laboratories as specified by article 10 (Commission Regulation (EC) No 378/2005) is not considered necessary.
Recommended Method
as of:
- Commission Implementing Regulation (EU) 2020/377
For the quantification of total selenium in the feed additive:
Titration
For the quantification of total sodium in sodium selenate:
Atomic Absorption Spectrometry (AAS) – EN ISO 6869:2000; or
Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) – EN 15510:2007
For the quantification of total selenium in premixtures, feed materials and compound feed:
Hydride Generation Atomic Absorption Spectrometry (HGAAS) after microwave digestion – EN 16159:2012