標(biāo)準(zhǔn)號：BS DD ISO/TS 17764-1-2002
中文標(biāo)準(zhǔn)名稱：動物飼料.脂肪酸含量的測定.甲酯的制備
英文標(biāo)準(zhǔn)名稱：Animal feeding stuffs - Determination of the content of fatty acids - Preparation of methyl esters
標(biāo)準(zhǔn)類型：B46
發(fā)布日期：2002/12/20 12:00:00
實施日期：2002/12/20 12:00:00
中國標(biāo)準(zhǔn)分類號：B46
國際標(biāo)準(zhǔn)分類號：65.120
適用范圍：ISO/TS 17764 specifies methods for the quantitative determination of individual fatty acids and of the sum of the fatty acids (elutable fatty acids). This part of ISO/TS 17764 specifies two methods for preparing the methyl esters of fatty acids of animat and vegetable fats, oils and fatty acid mixtures for raw materials for compound animal feeds, and fatty acids originating from fat extracts of animal feeding stuffs, including fats and fatty acid mixtures containing butyric acid. The general method, the boron trifluoride (BF3) method, is concerned with the preparation of methyl esters of fatty acids with six or more C atoms, originating from fats, oils and free fatty acids. The KOH/HCI method is concerned with the preparation of methyl esters of fatty acids with four or more C atoms. This method can also be used for the quantitative determination of fatty acids with a chain length shorter than ten C atoms in free fatty acid mixtures. The methyl esters produced can be used for gas-liquid chromatography (GLC). NOTE 1 Unsaponifiable materials are not removed and can, when present in considerable amounts, interfere with the chromatographic analysis. NOTE 2 ISO/TS 17764-2 describes the application of gas chromatography with capillary columns and flame ionization detection for the determination of the content of fatty acids in a fat by making use of the methyl esters of the fatty acids obtained in accordance with the methods specified in this part of ISO/TS 17764.