Towards SERS based applications in food analytics : Lipophilic sensor layers for the detection of Sudan III in food matrices

Titelangaben

Jahn, Martin ; Patze, Sophie ; Bocklitz, Thomas ; Weber, Karina ; Cialla-May, Dana ; Popp, Jürgen:
Towards SERS based applications in food analytics : Lipophilic sensor layers for the detection of Sudan III in food matrices.
In: Analytica Chimica Acta. Bd. 860 (2015) . - S. 43-50.
ISSN 1873-4324
DOI: https://doi.org/10.1016/j.aca.2015.01.005

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Abstract

Food safety is an topic of great importance for our society which places high demands on analytical methods. Surface enhanced Raman spectroscopy (SERS) meets the requirements for a rapid, sensitive and specific detection technique. The fact that metallic colloids, one of the most often used {SERS} substrates, are usually prepared in aqueous solution makes the detection of water-insoluble substances challenging. In this paper we present a {SERS} based approach for the detection of water-insoluble molecules by applying a hydrophobic surface modification onto the surface of enzymatic generated silver nanoparticles. By this approach the detection of the illegal water-insoluble food dyes, such as Sudan {III} in presence of riboflavin, as water-soluble competitor, is possible. Moreover, we demonstrate the usability of this kind of {SERS} substrates for determination of Sudan {III} out of spiked paprika extracts.