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Lee KJ, Trowbridge AC, Bruce GD, Dwapanyin GO, Dunning KR, Dholakia K, Schartner EP. Learning algorithms for identification of whisky using portable Raman spectroscopy. Curr Res Food Sci 2024; 8:100729. [PMID: 38595930 PMCID: PMC11002798 DOI: 10.1016/j.crfs.2024.100729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/13/2024] [Accepted: 03/30/2024] [Indexed: 04/11/2024] Open
Abstract
Reliable identification of high-value products such as whisky is vital due to rising issues of brand substitution and quality control in the industry. We have developed a novel framework that can perform whisky analysis directly from raw spectral data with no human intervention by integrating machine learning models with a portable Raman device. We demonstrate that machine learning models can achieve over 99% accuracy in brand or product identification across twenty-eight commercial samples. To demonstrate the flexibility of this approach, we utilized the same algorithms to quantify ethanol concentrations, as well as measuring methanol levels in spiked whisky samples. To demonstrate the potential use of these algorithms in a real-world environment we tested our algorithms on spectral measurements performed through the original whisky bottle. Through the bottle measurements are facilitated by a beam geometry hitherto not applied to whisky brand identification in conjunction with machine learning. Removing the need for decanting greatly enhances the practicality and commercial potential of this technique, enabling its use in detecting counterfeit or adulterated spirits and other high-value liquids. The techniques established in this paper aim to function as a rapid and non-destructive initial screening mechanism for detecting falsified and tampered spirits, complementing more comprehensive and stringent analytical methods.
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Affiliation(s)
- Kwang Jun Lee
- Centre of Light for Life (CLL) and Institute for Photonics and Advanced Sensing (IPAS), The University of Adelaide, Adelaide, 5005, SA, Australia
- School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, 5005, SA, Australia
- School of Biological Sciences, The University of Adelaide, Adelaide, 5005, SA, Australia
| | - Alexander C. Trowbridge
- Centre of Light for Life (CLL) and Institute for Photonics and Advanced Sensing (IPAS), The University of Adelaide, Adelaide, 5005, SA, Australia
- School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, 5005, SA, Australia
- School of Biological Sciences, The University of Adelaide, Adelaide, 5005, SA, Australia
| | - Graham D. Bruce
- SUPA School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, Fife, United Kingdom
| | - George O. Dwapanyin
- SUPA School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, Fife, United Kingdom
| | - Kylie R. Dunning
- School of Biological Sciences, The University of Adelaide, Adelaide, 5005, SA, Australia
- Robinson Research Institute, School of Biomedicine, The University of Adelaide, Adelaide, 5005, SA, Australia
| | - Kishan Dholakia
- Centre of Light for Life (CLL) and Institute for Photonics and Advanced Sensing (IPAS), The University of Adelaide, Adelaide, 5005, SA, Australia
- SUPA School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, Fife, United Kingdom
- School of Biological Sciences, The University of Adelaide, Adelaide, 5005, SA, Australia
| | - Erik P. Schartner
- Centre of Light for Life (CLL) and Institute for Photonics and Advanced Sensing (IPAS), The University of Adelaide, Adelaide, 5005, SA, Australia
- School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, 5005, SA, Australia
- Robinson Research Institute, School of Biomedicine, The University of Adelaide, Adelaide, 5005, SA, Australia
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Okolo CA, Kilcawley KN, O'Connor C. Recent advances in whiskey analysis for authentication, discrimination, and quality control. Compr Rev Food Sci Food Saf 2023; 22:4957-4992. [PMID: 37823807 DOI: 10.1111/1541-4337.13249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 08/29/2023] [Accepted: 09/12/2023] [Indexed: 10/13/2023]
Abstract
In order to safeguard authentic whiskey products from fraudulent or counterfeit practices, high throughput solutions that provide robust, rapid, and reliable solutions are required. The implementation of some analytical strategies is quite challenging or costly in routine analysis. Qualitative screening of whiskey products has been explored, but due to the nonspecificity of the chemical compounds, a more quantitative confirmatory technique is required to validate the result of the whiskey analysis. Hence, combining analytical and chemometric methods has been fundamental in whiskey sample differentiation and classification. A comprehensive update on the most relevant and current analytical techniques, including spectroscopic, chromatographic, and novel technologies employed within the last 5 years in whiskey analysis for authentication, discrimination, and quality control, are presented. Furthermore, the technical challenges in employing these analytical techniques, future trends, and perspectives are emphasized.
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Affiliation(s)
- Chioke A Okolo
- FOCAS Research Institute, Technological University Dublin, Dublin, Ireland
- School of Food Science & Environmental Health, Technological University Dublin, Dublin, Ireland
| | - Kieran N Kilcawley
- Food Quality & Sensory Science Department, Teagasc Food Research Centre, Co Cork, Ireland
- School of Food and Nutritional Sciences, College of Science, Engineering and Food Science, University College Cork, Cork, Ireland
| | - Christine O'Connor
- School of Food Science & Environmental Health, Technological University Dublin, Dublin, Ireland
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Williams SJ, Islam S, Velev OD. Light scattering of colloidal suspensions: formation and stability in bourbon whiskeys. JOURNAL OF THE INSTITUTE OF BREWING 2022. [DOI: 10.1002/jib.689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Stuart J. Williams
- Department of Mechanical Engineering University of Louisville Louisville KY USA
| | - Sabina Islam
- Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh NC USA
| | - Orlin D. Velev
- Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh NC USA
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Shillito GE, Mcmillan L, Bruce GD, Dholakia K. To focus-match or not to focus-match inverse spatially offset Raman spectroscopy: a question of light penetration. OPTICS EXPRESS 2022; 30:8876-8888. [PMID: 35299330 DOI: 10.1364/oe.451496] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
The ability to identify the contents of a sealed container, without the need to extract a sample, is desirable in applications ranging from forensics to product quality control. One technique suited to this is inverse spatially offset Raman spectroscopy (ISORS) which illuminates a sample of interest with an annular beam of light and collects Raman scattering from the center of the ring, thereby retrieving the chemical signature of the contents while suppressing signal from the container. Here we explore in detail the relative benefits of a recently developed variant of ISORS, called focus-matched ISORS. In this variant, the Fourier relationship between the annular beam and a tightly focused Bessel beam is exploited to focus the excitation light inside the sample and to match the focal point of excitation and collection optics to increase the signal from the contents without compromising the suppression of the container signal. Using a flexible experimental setup which can realize both traditional and focus-matched ISORS, and Monte-Carlo simulations, we elucidate the relative advantages of the two techniques for a range of optical properties of sample and container.
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