Spatially offset Raman spectroscopy: A convenient and rapid tool to distinguish cheese made with milks from different animal species. (19th August 2021)

• Record Type: Journal Article
• Authors: Ostovar pour, Saeideh; Afshari, Roya; Landry, Jeremy; Pillidge, Christopher; Gill, Harsharn; Blanch, Ewan
• Is Part Of: Journal of Raman spectroscopy. Volume 52:Number 10(2021)
• Page Start: 1705
• Page End: 1711
• Publication Date: 2021-08-19
• Subjects: cheese -- milk -- spatially off‐set Raman spectroscopy (SORS); Raman spectroscopy -- Periodicals; 535.846
• DOI: 10.1002/jrs.6179
• Languages: English
• ISSNs: 0377-0486

Abstract

Abstract: Authenticity is of great importance in the food industry. There is a need for rapid, reliable methods that can 'fingerprint' foods and show their composition. In this study, we trialled spatially offset Raman spectroscopy (SORS) as a convenient method to distinguish between cheeses of different animal origins. SORS is a rapid non‐destructive method that can be applied to food products in various packaging materials such as plastic. The technique also has the capability to monitor larger volume of sample in contrast with conventional Raman spectroscopy. Eight cheese products were examined in relation to, and discrimination between them was based upon, protein and fat content, phospholipids and carotenoids. Chemometrics analysis further enabled differentiation of even closely related cheese types. SORS has great potential as a rapid, real‐time tool for screening of foods for authenticity, and in the future, this could be extended to monitoring for food quality targeting specific molecules. Abstract : The potential of spatially off‐set Raman spectroscopy (SORS) for distinguishing different cheese types was investigated. This technique makes it possible to measure the Raman signal few mm below the surface of cheese samples, allowing non‐invasive analysis of cheeses inside package that are not readily feasible using conventional Raman spectroscopy.