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首页> 外文期刊>The Journal of automatic chemistry >Determination of Cyclopropane Fatty Acids in Food of Animal Origin by 1H NMR
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Determination of Cyclopropane Fatty Acids in Food of Animal Origin by 1H NMR

机译：1H NMR测定动物源性食品中的环丙烷脂肪酸

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Cyclopropane fatty acids (CPFAs) are unusual fatty acids of microbial origin, recently detected in milk and dairy products. CPFAs have been demonstrated to be interesting molecular markers for authentication of dairy products obtained without ensiled feeds. Moreover, they can also be recognized as a new secondary component of human diet. Information is lacking on the presence of cyclic fatty acids in other food sources. Cyclopropane fatty acids have been detected by GC-MS analysis in cheese and other animal fats in concentration ranging from 200 to 1000?mg/kg fat, but in some cases, the complex fatty acid profile and the possible presence of interfering peaks make the separation not straightforward and the quantification uneasy. Therefore, a new reliable 1H NMR method was developed to detect and measure CPFA content in different foods of animal origin, based on the detection of the characteristic signals of cyclopropane ring. The 1H NMR (600?MHz) method showed detection limits comparable with those of full scan GC-MS, and it allowed the identification and quantitation of the cyclopropane fatty acids in different foods.
机译：环丙烷脂肪酸（CPFA）是微生物来源的不常见脂肪酸，最近在牛奶和乳制品中被发现。已经证明，CPFA是用于验证不含青贮饲料的乳制品的有趣分子标记。而且，它们也可以被认为是人类饮食中的新的次要成分。缺乏有关其他食物来源中环状脂肪酸的信息。通过GC-MS分析可在奶酪和其他动物脂肪中检测到环丙烷脂肪酸，其浓度范围为200至1000？mg / kg脂肪，但在某些情况下，复杂的脂肪酸谱和可能存在的干扰峰使分离得以进行不简单，量化不容易。因此，在环丙烷环特征信号的检测基础上，开发了一种可靠的1H NMR新方法，用于检测和测量不同动物源性食品中的CPFA含量。 1H NMR（600？MHz）方法显示的检出限与全扫描GC-MS相当，并且可以鉴定和定量不同食品中的环丙烷脂肪酸。

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