Innovative Surface-Enhanced Raman Spectroscopy Method as a Fast Tool to Assess the Oxidation of Lipids in Ground Pork - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue Applied Sciences Année : 2023

Innovative Surface-Enhanced Raman Spectroscopy Method as a Fast Tool to Assess the Oxidation of Lipids in Ground Pork

Magdalena Wrona
Juliette Lours
  • Fonction : Auteur
Jesús Salafranca
Cristina Nerín

Résumé

A novel method for the determination of lipid oxidation using Raman microscopy was developed. A home-made surface-enhanced Raman spectroscopy (SERS) substrate based on silver nanoparticles deposited on a glass Petri dish was used. The degradation of ground pork stored at 5 °C was monitored for 16 days. Two packages were considered: an active packaging containing an oregano extract with antioxidant properties and a conventional one consisting of a low-density polyethylene (LDPE) film. The lipid fraction of the ground pork was extracted with a mixture of diethyl ether/n-hexane (1:1). A remarkable maximum signal enhancement factor of 1.64 × 107 at 1439 cm−1 shift (and up to 8.58 × 106 at 1655 cm−1, chosen for fat oxidation assessment) was obtained with SERS compared to conventional Raman. In addition, SERS provided better discrimination among samples than the results obtained by the thiobarbituric acid reactive substances (TBARS) method. The experimental conditions for SERS were optimized and discussed.

Domaines

Chimie
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Origine : Publication financée par une institution

Dates et versions

hal-04388103 , version 1 (05-04-2024)

Identifiants

Citer

Magdalena Wrona, Juliette Lours, Jesús Salafranca, Catherine Joly, Cristina Nerín. Innovative Surface-Enhanced Raman Spectroscopy Method as a Fast Tool to Assess the Oxidation of Lipids in Ground Pork. Applied Sciences, 2023, 13 (9), pp.5533. ⟨10.3390/app13095533⟩. ⟨hal-04388103⟩
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