SERS-based application in food analytics (Conference Presentation)

Dana Cialla-May; Andreea Radu; Martin Jahn; Karina Weber; Jürgen Popp

doi:10.1117/12.2252134

21 April 2017 SERS-based application in food analytics (Conference Presentation)

Dana Cialla-May, Andreea Radu, Martin Jahn, Karina Weber, Jürgen Popp

Proceedings Volume 10080, Plasmonics in Biology and Medicine XIV; 1008009 (2017) https://doi.org/10.1117/12.2252134
Event: SPIE BiOS, 2017, San Francisco, California, United States

Abstract

To establish detection schemes in life science applications, specific and sensitive methods allowing for fast detection times are required. Due to the interaction of molecules with strong electromagnetic fields excited at metallic nanostructures, the molecular fingerprint specific Raman spectrum is increased by several orders of magnitude. This effect is described as surface-enhanced Raman spectroscopy (SERS) and became a very powerful analytical tool in many fields of application. Within this presentation, we will introduce innovative bottom-up strategies to prepare SERS-active nanostructures coated with a lipophilic sensor layer. To do so, the food colorant Sudan III, an indirect carcinogen substance found in chili powder, palm oil or spice mixtures, is detected quantitatively in the background of the competitor riboflavin as well as paprika powder extracts. The SERS-based detection of azorubine (E122) in commercial available beverages with different complexity (e.g. sugar content, alcohol concentration) illustrates the strong potential of SERS as a qualitative as well as semiquantitative prescan method in food analytics. Here, a good agreement between the estimated concentration employing SERS as well as the gold standard technique HPLC, a highly laborious method, is found. Finally, SERS is applied to detect vitamin B2 and B12 in cereals as well as the estimate the ratio of lycopene and β-carotene in tomatoes.

Acknowledgement: Funding the projects “QuantiSERS” and “Jenaer Biochip Initiative 2.0” within the framework “InnoProfile Transfer – Unternehmen Region“ the Federal Ministry of Education and Research, Germany (BMBF) is gratefully acknowledged.

Conference Presentation

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Dana Cialla-May, Andreea Radu, Martin Jahn, Karina Weber, and Jürgen Popp "SERS-based application in food analytics (Conference Presentation)", Proc. SPIE 10080, Plasmonics in Biology and Medicine XIV, 1008009 (21 April 2017); https://doi.org/10.1117/12.2252134

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KEYWORDS

Surface enhanced Raman spectroscopy

Analytics

Molecular interactions

Nanostructures

Electromagnetism

Gold

Life sciences

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