Rapid screening of melamine in dried milk without destroying the samples by Raman spectroscopy

概要

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Melamine is a raw ingredient for plastics, but it is frequently misused by adding it to food to give the false impression of a high protein content, since the molecule has a very high nitrogen content. Samples of dried milk obtained from 5 manufacturers containing varying levels of melamine were illuminated by a small cross-section of a laser beam and the scattered light was examined. The presence of melamine in contaminated milk could be immediately detected without any chemical or physical alteration of the milk by interpreting its Raman scattering spectra. Among its many Raman bands, the intense 676 cm-1 band was the most useful for detecting melamine; 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 the extraction and interaction with chemical reagents. The method provides a very rapid screening test for melamine-adulterated dried milk in food chemistry and forensic toxicology.
Springerの論文
2009-07-01