Journal
ANALYTICA CHIMICA ACTA
Volume 860, Issue -, Pages 43-50Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2015.01.005
Keywords
Surface enhanced Raman spectroscopy; Sensor layers; Food safety; Sudan dye detection
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Funding
- Federal Ministry of Education and Research, Germany (BMBF) [03IPT513Y, 03IPT513A]
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Food safety is a 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. (C) 2015 Elsevier B.V. All rights reserved.
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