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MO: Fachverband Molekülphysik

MO 26: Poster: Biomolecules

MO 26.8: Poster

Donnerstag, 17. März 2011, 16:00–18:00, P2

Raman Spectroscopy — A Rapid Tool for Food Investigation — •Rasha Hassanein, Patrice Donfack, Pinkie Eravuchira, Bernd von der Kammer, and Arnulf Materny — Center of Functional Materials and Nanomolecular Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany

Raman scattering gives access to the vibrational fingerprints of molecules. Recently, Raman spectroscopy has been introduced in food analysis since it can provide content-relevant information based on well-defined and resolved spectra in various sample categories. The major advantages of this technique lies in the fact that it requires no or only little sample preparation, it is a rapid and nondestructive tool, and when combined with a fiber-optic sampling station, can make such a system ideally suited for in-line industrial processing. In our research, we have demonstrated the capabilities of dispersive Raman spectroscopy using visible excitation in combination with appropriate chemometric methods for the investigation of different food types, such as edible oils, citrus oils, milk, and green coffee. The advantage of using an excitation with visible light (VIS) is the increased signal intensity in general and in some cases (e.g. for carotenoids) the resonance enhancement, which helps to detect also constituents at lower concentrations. In our contribution, we will present the potential of Raman spectroscopy with VIS excitation for the investigation various food types.