- 24 Oktober 2013 (Senest opdateret den: 6 Juni 2016)
Characterisation of the feed additive:
- X-ray diffraction (XRD),
- atomic absorption spectrophotometry (AAS)
In the current application authorisation is sought under article 4(1) Fluidol, natural mixture of dolomite plus magnesite and magnesiumphyllosilicates (later referred as DMM), under the category/functional group and 1(i) 'technological additives'/'binders' and 'anticaking agents', according to the classification system of Annex I of Regulation (EC) No 1831/2003. The authorisation is sought for the use of the feed additive for all animal species. DMM is an odourless grey powder obtained by crushing and milling natural rocks. The feed additive consists mainly of dolomite, magnesite and magnesiumphyllosilicates and other minerals such as hydrated silicates. According to the Applicant, the feed additive contains a minimum of 40 % of dolomite and magnesite. The feed additive is intended to be used in premixtures and feedingstuffs. The Applicant did not specify any maximum or minimum concentration of DMM in feedingstuffs but recommends a dosage of 0.5 - 2 % for all animal species.
For the determination of mineralogical composition of the feed additive the Applicant submitted experimental data obtained using X-ray diffraction (XRD) method. Furthermore, the chemical composition of the feed additive was characterised by the Applicant using atomic absorption spectrophotometry (AAS). Based on the experimental evidence provided, the EURL recommends for official control the two methods (XRD and AAS) for the characterisation of Fluidol.
As the quantification of DMM in premixtures and feedingstuffs is not achievable experimentally, the EURL cannot recommend any method for official control in these matrices.
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.