Norm

NEN-EN-ISO 13903:1999 Ontw. en

Diervoeders - Bepaling van de gehalten aan aminozuren - Ionchromatografische methode

  • Deze norm is ingetrokken sinds 10-02-2004

23,85 28,86 Incl BTW

Over deze norm

Status Ingetrokken
Aantal pagina's 12
Commissie Diervoeder
Gepubliceerd op 01-08-1999
Taal Engels
This International Standard describes the determination of free (synthetic and natural) and total (peptide bound and free) amino acids in feedingstuffs, using an amino acid analyser or HPLC equipment. It is applicable to the following amino acids:- sum of cystine and cysteine;- methionine;- lysine;- threo nine;- alanine;- arginine;- aspartic acid;- glutamic acid;- glycine;- histidine;- isoleucine;- leucine;- phenylalanine;- proline;- serine;- tyrosine;- valine. The method does not distinguish between the salts of amino acids, nor does it differentiate between D and L forms of amino acids. It is not valid for the determination of tryptophan or hydroxy analogues of amino acids. Limits of quantification depend on the chromatographic equipment, but levels as low as: 0,3 g/kg total lysine; 0,25 g/kg total methionine; 0,35 g/kg total cystine plus cysteine; 0,2 g/kg total threonine; 0,035 g/kg free lysine; 0,035 g/kg free methionine; and 0,03 g/kg free threonine can typically be analysed. NOTE - A lower limit of quantification or detection might be achievable but this is to be validated by the users.

Details

ICS-code 65.120
Nederlandse titel Diervoeders - Bepaling van de gehalten aan aminozuren - Ionchromatografische methode
Engelse titel Animal feeding stuffs - Determination of amino acids content - Ion-chromatographic method
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