Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin
The sensorial properties of Colombian coffee are renowned worldwide, which is reflected in its market value. This raises the threat of fraud by adulteration using coffee grains from other countries, thus creating a demand for robust and cost-effective methods for the determination of geographical or...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Analytical Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2017/7210463 |
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| author | Jessica Medina Diana Caro Rodríguez Victoria A. Arana Andrés Bernal Pierre Esseiva Julien Wist |
| author_facet | Jessica Medina Diana Caro Rodríguez Victoria A. Arana Andrés Bernal Pierre Esseiva Julien Wist |
| author_sort | Jessica Medina |
| collection | DOAJ |
| description | The sensorial properties of Colombian coffee are renowned worldwide, which is reflected in its market value. This raises the threat of fraud by adulteration using coffee grains from other countries, thus creating a demand for robust and cost-effective methods for the determination of geographical origin of coffee samples. Spectroscopic techniques such as Nuclear Magnetic Resonance (NMR), near infrared (NIR), and mid-infrared (mIR) have arisen as strong candidates for the task. Although a body of work exists that reports on their individual performances, a faithful comparison has not been established yet. We evaluated the performance of 1H-NMR, Attenuated Total Reflectance mIR (ATR-mIR), and NIR applied to fraud detection in Colombian coffee. For each technique, we built classification models for discrimination by species (C. arabica versus C. canephora (or robusta)) and by origin (Colombia versus other C. arabica) using a common set of coffee samples. All techniques successfully discriminated samples by species, as expected. Regarding origin determination, ATR-mIR and 1H-NMR showed comparable capacity to discriminate Colombian coffee samples, while NIR fell short by comparison. In conclusion, ATR-mIR, a less common technique in the field of coffee adulteration and fraud detection, emerges as a strong candidate, faster and with lower cost compared to 1H-NMR and more discriminating compared to NIR. |
| format | Article |
| id | doaj-art-31196377a24e4bf89eca51e8d26dcdc9 |
| institution | Kabale University |
| issn | 1687-8760 1687-8779 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Analytical Chemistry |
| spelling | doaj-art-31196377a24e4bf89eca51e8d26dcdc92025-02-03T01:25:40ZengWileyInternational Journal of Analytical Chemistry1687-87601687-87792017-01-01201710.1155/2017/72104637210463Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical OriginJessica Medina0Diana Caro Rodríguez1Victoria A. Arana2Andrés Bernal3Pierre Esseiva4Julien Wist5Chemistry Department, Universidad del Valle, AA 25360, Cali, ColombiaInstitut de Police Scientifique, Ecole des Sciences Criminelles, Université de Lausanne, 1015 Lausanne, SwitzerlandGrupo de Investigación Ciencias, Educación y Tecnología-CETIC, Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Km 7 Antigua Vía Puerto Colombia, Barranquilla, Atlántico, ColombiaChemistry Department, Universidad del Valle, AA 25360, Cali, ColombiaInstitut de Police Scientifique, Ecole des Sciences Criminelles, Université de Lausanne, 1015 Lausanne, SwitzerlandChemistry Department, Universidad del Valle, AA 25360, Cali, ColombiaThe sensorial properties of Colombian coffee are renowned worldwide, which is reflected in its market value. This raises the threat of fraud by adulteration using coffee grains from other countries, thus creating a demand for robust and cost-effective methods for the determination of geographical origin of coffee samples. Spectroscopic techniques such as Nuclear Magnetic Resonance (NMR), near infrared (NIR), and mid-infrared (mIR) have arisen as strong candidates for the task. Although a body of work exists that reports on their individual performances, a faithful comparison has not been established yet. We evaluated the performance of 1H-NMR, Attenuated Total Reflectance mIR (ATR-mIR), and NIR applied to fraud detection in Colombian coffee. For each technique, we built classification models for discrimination by species (C. arabica versus C. canephora (or robusta)) and by origin (Colombia versus other C. arabica) using a common set of coffee samples. All techniques successfully discriminated samples by species, as expected. Regarding origin determination, ATR-mIR and 1H-NMR showed comparable capacity to discriminate Colombian coffee samples, while NIR fell short by comparison. In conclusion, ATR-mIR, a less common technique in the field of coffee adulteration and fraud detection, emerges as a strong candidate, faster and with lower cost compared to 1H-NMR and more discriminating compared to NIR.http://dx.doi.org/10.1155/2017/7210463 |
| spellingShingle | Jessica Medina Diana Caro Rodríguez Victoria A. Arana Andrés Bernal Pierre Esseiva Julien Wist Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin International Journal of Analytical Chemistry |
| title | Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin |
| title_full | Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin |
| title_fullStr | Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin |
| title_full_unstemmed | Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin |
| title_short | Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and 1H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin |
| title_sort | comparison of attenuated total reflectance mid infrared near infrared and 1h nuclear magnetic resonance spectroscopies for the determination of coffee s geographical origin |
| url | http://dx.doi.org/10.1155/2017/7210463 |
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