标准编号：ISO 16958:2015
中文名称：牛奶、奶制品、婴儿和成人营养品 脂肪酸成分测定-毛细管气层分析法
英文名称：Milk, milk products, infant formula and adult nutritionals — Determination of fatty acids composition — Capillary gas chromatographic method
发布日期：2015-11
标准范围
This International Standard specifies a method for the quantification of individual and/or all fatty acidsin the profile of milk, milk products, infant formula and adult nutritional formula, containing milk fatand/or vegetable oils, supplemented or not supplemented with oils rich in long chain polyunsaturatedfatty acids (LC-PUFA). This also includes groups of fatty acids often labelled [i.e. trans fatty acids (TFA),saturated fatty acids (SFA), monounsaturated fatty acids (MUFA), polyunsaturated fatty acids (PUFA),omega-3, omega-6 and omega-9 fatty acids] and/or individual fatty acids [i.e. linoleic acid (LA), α-linolenicacid (ALA), arachidonic acid (ARA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)].The determination is performed by direct transesterification in food matrices, without prior fatextraction, and consequently it is applicable to liquid samples or reconstituted powder samples withwater having total fat ≥ 1,5 % m/m.The fat extracted from products containing less than 1,5 % m/m fat can be analysed with the samemethod after a preliminary fat extraction using methods referenced in Clause 2. Dairy products, likesoft or hard cheeses with acidity level ≤ 1 mmol/100 g of fat, can be analysed after a preliminary fatextraction using methods referenced in Clause 2. For products supplemented or enriched with PUFAwith fish oil or algae origins, the evaporation of solvents should be performed at the lowest possibletemperature (e.g. max. 40 °C) to recover these sensitive fatty acids.
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