Rapid nondestructive screening for melamine in dried milk by Raman spectroscopy
Rapid nondestructive screening for melamine in dried milk by Raman spectroscopy
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DOI：
10.1007/s11419-009-0072-3
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发表时间：
2009-07-01
影响因子：
2.2
通讯作者：
Tu, Anthony T.
中科院分区：
文献类型：
--
作者：
Okazaki, Shigetoshi;Hiramatsu, Mitsuo;Tu, Anthony T.
三聚氰胺是制造塑料的原料，但它经常被滥用，被添加到食物中以提高氮含量，从而给人以高蛋白质含量的假象。从日本的五家制造商那里获得的奶粉样本中添加了不同数量的三聚氰胺。用激光束的小横截面照射样品，并检查散射光。通过解释牛奶的拉曼散射光谱，可以立即检测牛奶中三聚氰胺的存在，而不会对牛奶进行任何化学或物理改变。在众多的拉曼谱带中，676 cm（-1）处的强谱带对于检测三聚氰胺最有用;检测限约为1%（w/w）。因为这种方法不从奶粉样品中提取三聚氰胺，所以它降低了在提取过程中或与化学试剂相互作用时可能发生的错误风险。该方法为食品化学和法医毒理学中三聚氰胺掺假奶粉的快速筛查提供了一种新的方法。
Melamine is a raw ingredient for the manufacture of plastics, but it is frequently misused by adding it to food to raise the nitrogen content, thereby giving the false impression of a high protein content. Varied amounts of melamine were added to samples of dried milk obtained from five manufacturers in Japan. The samples were illuminated by a small cross section of a laser beam and the scattered light was examined. The presence of melamine in milk could be immediately detected without any chemical or physical alteration of the milk by interpreting its Raman scattering spectra. Among the many Raman bands, an intense band at 676 cm(-1) was the most useful for detecting melamine; the detection limit was about 1% (w/w). Because this method does not extract melamine from the dried milk sample, it reduces the risk of error that may occur during extraction or from interaction with chemical reagents. The method provides a very rapid screening test for melamineadulterated dried milk in food chemistry and forensic toxicology.