Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh Produce
Identification of chemical properties in the inner tissues of fresh produce would enable us to identify major issues plaguing the agriculture supply chain, like off-flavors and core rot since these are caused by or accompanied by known chemical elements. We show the development of transmission Raman...
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MDPI AG
2025-04-01
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| author | Rani Arielly |
| author_facet | Rani Arielly |
| author_sort | Rani Arielly |
| collection | DOAJ |
| description | Identification of chemical properties in the inner tissues of fresh produce would enable us to identify major issues plaguing the agriculture supply chain, like off-flavors and core rot since these are caused by or accompanied by known chemical elements. We show the development of transmission Raman spectroscopy system for identifying these elements by addressing several issues: we located an optimal spectral window by conducting optical attenuation measurements and calculated the required LASER power in that range. For apple tissues, this optical window was found in the 700–950 nm range, and the required LASER power range was calculated to be in the 40–700 mW range. We also calculated that the optimal shifted-excitation Raman difference spectroscopy wavelengths should be separated by 0.7 nm in order to optimally produce narrow and high-intensity Raman peak features and eliminate the competing fluorescence signal. Finally, we provide a complete optical system design with exact optimal parameters. In contrast to other fields like pharmaceuticals and medicine, transmission Raman spectroscopy has not been applied extensively in agriculture. Therefore, this study fills a gap in that field’s applicability. |
| format | Article |
| id | doaj-art-67ef8efffd7f4f29a14d85a47a9e4f6a |
| institution | OA Journals |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj-art-67ef8efffd7f4f29a14d85a47a9e4f6a2025-08-20T02:31:20ZengMDPI AGSensors1424-82202025-04-01259280510.3390/s25092805Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh ProduceRani Arielly0Institute of Agricultural and Biosystems Engineering, Agricultural Research Organization–Volcani Institute, Rishon LeZion 7505101, IsraelIdentification of chemical properties in the inner tissues of fresh produce would enable us to identify major issues plaguing the agriculture supply chain, like off-flavors and core rot since these are caused by or accompanied by known chemical elements. We show the development of transmission Raman spectroscopy system for identifying these elements by addressing several issues: we located an optimal spectral window by conducting optical attenuation measurements and calculated the required LASER power in that range. For apple tissues, this optical window was found in the 700–950 nm range, and the required LASER power range was calculated to be in the 40–700 mW range. We also calculated that the optimal shifted-excitation Raman difference spectroscopy wavelengths should be separated by 0.7 nm in order to optimally produce narrow and high-intensity Raman peak features and eliminate the competing fluorescence signal. Finally, we provide a complete optical system design with exact optimal parameters. In contrast to other fields like pharmaceuticals and medicine, transmission Raman spectroscopy has not been applied extensively in agriculture. Therefore, this study fills a gap in that field’s applicability.https://www.mdpi.com/1424-8220/25/9/2805postharvestfood qualityfood safetyopticsRaman spectroscopySERDS |
| spellingShingle | Rani Arielly Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh Produce Sensors postharvest food quality food safety optics Raman spectroscopy SERDS |
| title | Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh Produce |
| title_full | Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh Produce |
| title_fullStr | Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh Produce |
| title_full_unstemmed | Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh Produce |
| title_short | Transmission Raman Spectroscopy for Inner Layers Chemical Analysis of Fresh Produce |
| title_sort | transmission raman spectroscopy for inner layers chemical analysis of fresh produce |
| topic | postharvest food quality food safety optics Raman spectroscopy SERDS |
| url | https://www.mdpi.com/1424-8220/25/9/2805 |
| work_keys_str_mv | AT raniarielly transmissionramanspectroscopyforinnerlayerschemicalanalysisoffreshproduce |