標準號：BS EN ISO 13903-2005
中文標準名稱：動物飼料.氨基酸含量的測定
英文標準名稱：Animal feeding stuffs - Determination of amino acids content
標準類型：B46
發(fā)布日期：2005/10/24 12:00:00
實施日期：2005/10/24 12:00:00
中國標準分類號：B46
國際標準分類號：65.120
適用范圍：ISO 13903:2005 describes the determination of free (synthetic and natural) and total (peptide-bound and free) amino acids in feeding stuffs, using an amino acid analyser or HPLC equipment. It is applicable to the following amino acids: sum of cystine and cysteine; methionine; lysine; threonine; 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; 0,035g/kg free lysine; 0,035g/kg free methionine; and 0,03g/kg free threonine can typically be analysed.