Animal Products Research Team, National Institute of Livestock and Grassland Science, 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan.
Appl Spectrosc. 2010 Nov;64(11):1244-50. doi: 10.1366/000370210793335070.
Food safety requires the development of reliable techniques that ensure the origin of animal fats. In the present work, we try to verify the efficacy of using the polymorphic features of fats for discriminating animal-fat origins. We use Raman spectroscopy to collect the structural information of fat crystals. It is shown that a single Raman band at 1417 cm(-1) successfully differentiates pork fats from beef fats. This band is known to be characteristic of the β'-polymorph of fats. Pork fats show this band because they contain the β'-polymorph after rapid cooling to 0 °C. In beef-pork-fat mixtures, this band is not detected even in the presence of 50% pork fat; an addition of beef fat to pork fat is likely to produce a mixed fat with a completely different polymorphic behavior. This method seems to have the potential to detect beef products contaminated with pork-adipose tissue.
食品安全需要开发可靠的技术来确保动物脂肪的来源。在本工作中，我们尝试验证利用脂肪的多态性特征来鉴别动物脂肪来源的有效性。我们使用拉曼光谱来收集脂肪晶体的结构信息。结果表明，在 1417cm(-1)处的单个拉曼带成功地区分了猪肉脂肪和牛肉脂肪。该带已知是脂肪的β'-多晶型的特征。猪肉脂肪显示出该带，是因为它们在快速冷却至 0°C 后含有β'-多晶型。在牛肉-猪肉脂肪混合物中，即使存在 50%的猪肉脂肪也检测不到该带；向猪肉脂肪中添加牛肉脂肪可能会产生具有完全不同多晶型行为的混合脂肪。这种方法似乎有可能检测到被猪肉脂肪组织污染的牛肉产品。
