A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical Fruits
Tropical fruits such as cherimoya, soursop, and pineapple share sugars (glucose, fructose, and sucrose) in common but may differ in the content of other phytochemicals. In the present work, confocal Raman spectroscopy and partial least squares discriminant analysis (PLS-DA) were used to establish a...
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MDPI AG
2024-09-01
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| author | César R. Balcázar-Zumaeta Jorge L. Maicelo-Quintana Geidy Salón-Llanos Miguel Barrena Lucas D. Muñoz-Astecker Ilse S. Cayo-Colca Llisela Torrejón-Valqui Efraín M. Castro-Alayo |
| author_facet | César R. Balcázar-Zumaeta Jorge L. Maicelo-Quintana Geidy Salón-Llanos Miguel Barrena Lucas D. Muñoz-Astecker Ilse S. Cayo-Colca Llisela Torrejón-Valqui Efraín M. Castro-Alayo |
| author_sort | César R. Balcázar-Zumaeta |
| collection | DOAJ |
| description | Tropical fruits such as cherimoya, soursop, and pineapple share sugars (glucose, fructose, and sucrose) in common but may differ in the content of other phytochemicals. In the present work, confocal Raman spectroscopy and partial least squares discriminant analysis (PLS-DA) were used to establish a classification model among the three fruits and to evaluate the effect of pre-processing methods on the model’s performance. The Raman spectra showed that glucose was present in the fruits in the 800–900 cm<sup>−1</sup> band and the 1100–1200 cm<sup>−1</sup> band. While sucrose was present in the bands of 1131.22 cm<sup>−1</sup>, 1134.44 cm<sup>−1</sup>, and 1133.37 cm<sup>−1</sup> in the three fruits, fructose was present in the bands of 1464.22 cm<sup>−1</sup>, 1467.44 cm<sup>−1</sup>, and 1464.22 cm<sup>−1</sup> in cherimoya, soursop, and pineapple. The accuracy of the PLS-DA model varied according to the pre-processing methods used. The Savitzky–Golay first derivative method produced a model with 98.69–100% and 100% precision on the training and prediction data, respectively. |
| format | Article |
| id | doaj-art-608cf832814a4c3e9b2ab719b83f5bc2 |
| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-608cf832814a4c3e9b2ab719b83f5bc22025-08-20T01:55:58ZengMDPI AGApplied Sciences2076-34172024-09-011418847610.3390/app14188476A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical FruitsCésar R. Balcázar-Zumaeta0Jorge L. Maicelo-Quintana1Geidy Salón-Llanos2Miguel Barrena3Lucas D. Muñoz-Astecker4Ilse S. Cayo-Colca5Llisela Torrejón-Valqui6Efraín M. Castro-Alayo7Instituto de Investigación, Innovación y Desarrollo para el Sector Agrario y Agroindustrial (IIDAA), Facultad de Ingeniería y Ciencias Agrarias, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruFacultad de Ingeniería Zootecnista, Agronegocios y Biotecnología, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruInstituto de Investigación, Innovación y Desarrollo para el Sector Agrario y Agroindustrial (IIDAA), Facultad de Ingeniería y Ciencias Agrarias, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruFacultad de Ingeniería Civil y Ambiental, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruInstituto de Investigación, Innovación y Desarrollo para el Sector Agrario y Agroindustrial (IIDAA), Facultad de Ingeniería y Ciencias Agrarias, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruFacultad de Ingeniería Zootecnista, Agronegocios y Biotecnología, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruInstituto de Investigación, Innovación y Desarrollo para el Sector Agrario y Agroindustrial (IIDAA), Facultad de Ingeniería y Ciencias Agrarias, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruInstituto de Investigación, Innovación y Desarrollo para el Sector Agrario y Agroindustrial (IIDAA), Facultad de Ingeniería y Ciencias Agrarias, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco 342-350-356, Chachapoyas 01000, PeruTropical fruits such as cherimoya, soursop, and pineapple share sugars (glucose, fructose, and sucrose) in common but may differ in the content of other phytochemicals. In the present work, confocal Raman spectroscopy and partial least squares discriminant analysis (PLS-DA) were used to establish a classification model among the three fruits and to evaluate the effect of pre-processing methods on the model’s performance. The Raman spectra showed that glucose was present in the fruits in the 800–900 cm<sup>−1</sup> band and the 1100–1200 cm<sup>−1</sup> band. While sucrose was present in the bands of 1131.22 cm<sup>−1</sup>, 1134.44 cm<sup>−1</sup>, and 1133.37 cm<sup>−1</sup> in the three fruits, fructose was present in the bands of 1464.22 cm<sup>−1</sup>, 1467.44 cm<sup>−1</sup>, and 1464.22 cm<sup>−1</sup> in cherimoya, soursop, and pineapple. The accuracy of the PLS-DA model varied according to the pre-processing methods used. The Savitzky–Golay first derivative method produced a model with 98.69–100% and 100% precision on the training and prediction data, respectively.https://www.mdpi.com/2076-3417/14/18/8476chemometricfruitmultivariate methodsspectroscopysugar |
| spellingShingle | César R. Balcázar-Zumaeta Jorge L. Maicelo-Quintana Geidy Salón-Llanos Miguel Barrena Lucas D. Muñoz-Astecker Ilse S. Cayo-Colca Llisela Torrejón-Valqui Efraín M. Castro-Alayo A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical Fruits Applied Sciences chemometric fruit multivariate methods spectroscopy sugar |
| title | A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical Fruits |
| title_full | A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical Fruits |
| title_fullStr | A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical Fruits |
| title_full_unstemmed | A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical Fruits |
| title_short | A Novel Technique Using Confocal Raman Spectroscopy Coupled with PLS-DA to Identify the Types of Sugar in Three Tropical Fruits |
| title_sort | novel technique using confocal raman spectroscopy coupled with pls da to identify the types of sugar in three tropical fruits |
| topic | chemometric fruit multivariate methods spectroscopy sugar |
| url | https://www.mdpi.com/2076-3417/14/18/8476 |
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