Spatially Offset Raman Spectroscopy (SORS) as an Analytical Tool for the Sustainable Analysis of Packed Poultry

ABSTRACT As a highly sensitive food, the safety of meat is an important issue in the context of food safety. The current analytical methods for detection are based on different invasive procedures. The analysis of these foods, therefore, causes avoidable food losses in the case of foods that are still suitable for consumption. Spatially offset Raman spectroscopy (SORS) is a potential alternative analytical method, as it offers the possibility to measure through packaging. Previous SORS applications focused on very homogeneous matrices, which is why we wanted to test its suitability on more variable samples. Using packaged chicken breast as an example, we simulated two different storage conditions and compared these samples to control samples using SORS. To validate the group assignment and to monitor the resulting changes, total bacterial count and NMR spectra of the meat extracts were measured and evaluated. Despite high variance in the spectra measured through the sealed packaging, spoilage of samples could be detected. Comparison with unpackaged samples using the selected analysis methods even showed detection rates of 100% for spoiled samples.