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Calle JLP, Ferreiro-González M, Ruiz-Rodríguez A, Barbero GF, Álvarez JÁ, Palma M, Ayuso J. A Methodology Based on FT-IR Data Combined with Random Forest Model to Generate Spectralprints for the Characterization of High-Quality Vinegars. Foods 2021; 10:foods10061411. [PMID: 34207095 PMCID: PMC8233915 DOI: 10.3390/foods10061411] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 11/16/2022] Open
Abstract
Sherry wine vinegar is a Spanish gourmet product under Protected Designation of Origin (PDO). Before a vinegar can be labeled as Sherry vinegar, the product must meet certain requirements as established by its PDO, which, in this case, means that it has been produced following the traditional solera and criadera ageing system. The quality of the vinegar is determined by many factors such as the raw material, the acetification process or the aging system. For this reason, mainly producers, but also consumers, would benefit from the employment of effective analytical tools that allow precisely determining the origin and quality of vinegar. In the present study, a total of 48 Sherry vinegar samples manufactured from three different starting wines (Palomino Fino, Moscatel, and Pedro Ximénez wine) were analyzed by Fourier-transform infrared (FT-IR) spectroscopy. The spectroscopic data were combined with unsupervised exploratory techniques such as hierarchical cluster analysis (HCA) and principal component analysis (PCA), as well as other nonparametric supervised techniques, namely, support vector machine (SVM) and random forest (RF), for the characterization of the samples. The HCA and PCA results present a clear grouping trend of the vinegar samples according to their raw materials. SVM in combination with leave-one-out cross-validation (LOOCV) successfully classified 100% of the samples, according to the type of wine used for their production. The RF method allowed selecting the most important variables to develop the characteristic fingerprint (“spectralprint”) of the vinegar samples according to their starting wine. Furthermore, the RF model reached 100% accuracy for both LOOCV and out-of-bag (OOB) sets.
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Affiliation(s)
- José Luis P. Calle
- Department of Analytical Chemistry, Faculty of Sciences, University of Cadiz, Agrifood Campus of International Excellence (ceiA3), IVAGRO, 11510 Puerto Real, Spain; (J.L.P.C.); (A.R.-R.); (G.F.B.); (M.P.)
| | - Marta Ferreiro-González
- Department of Analytical Chemistry, Faculty of Sciences, University of Cadiz, Agrifood Campus of International Excellence (ceiA3), IVAGRO, 11510 Puerto Real, Spain; (J.L.P.C.); (A.R.-R.); (G.F.B.); (M.P.)
- Correspondence: ; Tel.: +34-956-01-6359
| | - Ana Ruiz-Rodríguez
- Department of Analytical Chemistry, Faculty of Sciences, University of Cadiz, Agrifood Campus of International Excellence (ceiA3), IVAGRO, 11510 Puerto Real, Spain; (J.L.P.C.); (A.R.-R.); (G.F.B.); (M.P.)
| | - Gerardo F. Barbero
- Department of Analytical Chemistry, Faculty of Sciences, University of Cadiz, Agrifood Campus of International Excellence (ceiA3), IVAGRO, 11510 Puerto Real, Spain; (J.L.P.C.); (A.R.-R.); (G.F.B.); (M.P.)
| | - José Á. Álvarez
- Department of Physical Chemistry, Faculty of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, 11510 Puerto Real, Spain; (J.Á.Á.); (J.A.)
| | - Miguel Palma
- Department of Analytical Chemistry, Faculty of Sciences, University of Cadiz, Agrifood Campus of International Excellence (ceiA3), IVAGRO, 11510 Puerto Real, Spain; (J.L.P.C.); (A.R.-R.); (G.F.B.); (M.P.)
| | - Jesús Ayuso
- Department of Physical Chemistry, Faculty of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, 11510 Puerto Real, Spain; (J.Á.Á.); (J.A.)
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Durán-Guerrero E, Castro R, García-Moreno MDV, Rodríguez-Dodero MDC, Schwarz M, Guillén-Sánchez D. Aroma of Sherry Products: A Review. Foods 2021; 10:foods10040753. [PMID: 33916278 PMCID: PMC8065788 DOI: 10.3390/foods10040753] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/30/2021] [Accepted: 03/31/2021] [Indexed: 12/20/2022] Open
Abstract
Jerez (Sherry) is a well-known wine-producing region located in southern Spain, where world-renowned oenological products such as wines, vinegars, and brandies are produced. There are several factors that provide characteristic physical, chemical, and sensory properties to the oenological products obtained in this Sherry region: the climate in the area with hot summers, mild winters, and with limited rainfall; the raw material used consisting on Palomino Fino, Moscatel, and Pedro Ximénez white grape varieties; the special vinification with fortified wines; and aging techniques such as a dynamic system of biological or oxidative aging. These special organoleptic characteristics are responsible for, among others, the aromatic profile of the wines, vinegars and brandies from the area, which explains why this is a subject that has been extensively researched over the years. This bibliographic review aims to compile the different scientific contributions that have been found to date, in relation with the aroma of the oenological products from the Sherry area (dry wines, sweet wines, vinegars, and brandies). We have mainly focused on the different analytical methodologies used and on the main analytes of interest.
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Affiliation(s)
- Enrique Durán-Guerrero
- Analytical Chemistry Department, Faculty of Sciences-IVAGRO, Agrifood Campus of International Excellence (ceiA3), Campus Universitario de Puerto Real, University of Cadiz, s/n, Puerto Real, 11510 Cadiz, Spain; (R.C.); (M.d.V.G.-M.); (M.d.C.R.-D.); (D.G.-S.)
- Correspondence: ; Tel.: +34-956-016-456
| | - Remedios Castro
- Analytical Chemistry Department, Faculty of Sciences-IVAGRO, Agrifood Campus of International Excellence (ceiA3), Campus Universitario de Puerto Real, University of Cadiz, s/n, Puerto Real, 11510 Cadiz, Spain; (R.C.); (M.d.V.G.-M.); (M.d.C.R.-D.); (D.G.-S.)
| | - María de Valme García-Moreno
- Analytical Chemistry Department, Faculty of Sciences-IVAGRO, Agrifood Campus of International Excellence (ceiA3), Campus Universitario de Puerto Real, University of Cadiz, s/n, Puerto Real, 11510 Cadiz, Spain; (R.C.); (M.d.V.G.-M.); (M.d.C.R.-D.); (D.G.-S.)
| | - María del Carmen Rodríguez-Dodero
- Analytical Chemistry Department, Faculty of Sciences-IVAGRO, Agrifood Campus of International Excellence (ceiA3), Campus Universitario de Puerto Real, University of Cadiz, s/n, Puerto Real, 11510 Cadiz, Spain; (R.C.); (M.d.V.G.-M.); (M.d.C.R.-D.); (D.G.-S.)
| | - Mónica Schwarz
- “Salus Infirmorum” Faculty of Nursing, University of Cadiz, 11001 Cadiz, Spain;
- Nutrition and Bromatology Area, Faculty of Medicine, University of Cadiz, Plaza Falla, 9, 11003 Cadiz, Spain
| | - Dominico Guillén-Sánchez
- Analytical Chemistry Department, Faculty of Sciences-IVAGRO, Agrifood Campus of International Excellence (ceiA3), Campus Universitario de Puerto Real, University of Cadiz, s/n, Puerto Real, 11510 Cadiz, Spain; (R.C.); (M.d.V.G.-M.); (M.d.C.R.-D.); (D.G.-S.)
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Processing multi-way chromatographic data for analytical calibration, classification and discrimination: A successful marriage between separation science and chemometrics. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2020.116128] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Zhou Z, Jian D, Gong M, Zhu S, Li G, Zhang S, Zhong F, Mao J. Characterization of the key aroma compounds in aged Zhenjiang aromatic vinegar by gas chromatography-olfactometry-mass spectrometry, quantitative measurements, aroma recombination and omission experiments. Food Res Int 2020; 136:109434. [PMID: 32846543 DOI: 10.1016/j.foodres.2020.109434] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 06/07/2020] [Accepted: 06/09/2020] [Indexed: 12/15/2022]
Abstract
Zhenjiang aromatic vinegar (ZAV) is one of the most famous traditional Chinese cereal vinegars. The key aroma compounds in aged ZAV were characterized by gas chromatography-olfactometry-mass spectrometry (GC-O-MS), odor activity values (OAVs), aroma recombination and omission experiments. Sensory analysis revealed that higher odor intensity of caramel-like, buttery and overall complexity were observed for aged ZAV compared with fresh ZAV. A total of 68 compounds were quantitated, including 27 odorants with OAVs >1.0 in the aged ZAV. Sotolon was detected for the first time in Chinese cereal vinegars. Furthermore, the levels of 2,3-butanedione, 2-methylpropanal, sotolon, dimethyl trisulfide, 3-hydroxy-2-butanone, 2,4,5-trimethyloxazole and tetramethylpyrazine changed significantly during the aging process. Aroma recombination revealed that the aroma profile of the aged vinegar could be closely simulated. Omission experiments demonstrated the important contributions of seven aroma compounds to the aged ZAV aroma, including 2,3-butanedione, acetic acid, 2-methylpropanal, sotolon, 2,4,5-trimethyloxazole, 3-methylbutanoic acid and tetramethylpyrazine. This study indicates that the aging process substantially contribute to the overall aroma of ZAV.
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Affiliation(s)
- Zhilei Zhou
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, Jiangsu, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Dongzhen Jian
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, Jiangsu, China; School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Min Gong
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, Jiangsu, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Shenghu Zhu
- Jiangsu Hengshun Vinegar Industry Co., Ltd., Zhenjiang 212143, Jiangsu, China
| | - Guoquan Li
- Jiangsu Hengshun Vinegar Industry Co., Ltd., Zhenjiang 212143, Jiangsu, China
| | - Si Zhang
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, Guangdong, China
| | - Fang Zhong
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jian Mao
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, Jiangsu, China; National Engineering Research Center for Huangjiu, Shaoxing 312000, Zhejiang, China.
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Comparison of the Novel Thin Film-Solid Phase Microextraction and Sorptive Extraction Methods for Picual and Hojiblanca Olive Oil Volatile Fraction Analysis in Headspace. Foods 2020; 9:foods9060748. [PMID: 32517060 PMCID: PMC7353552 DOI: 10.3390/foods9060748] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/01/2020] [Accepted: 06/01/2020] [Indexed: 12/17/2022] Open
Abstract
For first time, the new device named thin film solid phase microextraction (TF-SPME) has been used to determine the volatile profile of the Picual and Hojiblanca varieties of extra virgin olive oils. To this end, different traditional sampling methods such as headspace sorptive extraction (HSSE) with polydimethylsiloxane (PDMS) and polyethyleneglycol-modified silicone (EG/Silicone) Twisters® have been compared with the TF-SPME devices coated with different extraction polymeric phases. PARADISe software was used as a non-targeting method to process all data. The best results were obtained by HSSE-PDMS and 2TF-SPME. Moreover, the 2TF-SPME extraction method achieved the most adequate results of linearity for most compounds, according to F-values, while the intermediate precision results were similar for both 2TF-SPME and HSSE-PDMS sampling methods. Different sensitivity was observed between both sampling methods depending on the volatile compound, without being clearly influenced by the polarity of them. Although both sampling methods enabled the main active aroma of olive oil to be determined and for them to be differentiated according to olive variety, the 2TF-SPME method appears to be the most suitable for this goal.
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da Costa NL, Ximenez JPB, Rodrigues JL, Barbosa F, Barbosa R. Characterization of Cabernet Sauvignon wines from California: determination of origin based on ICP-MS analysis and machine learning techniques. Eur Food Res Technol 2020. [DOI: 10.1007/s00217-020-03480-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ríos-Reina R, Segura-Borrego MP, García-González DL, Morales ML, Callejón RM. A comparative study of the volatile profile of wine vinegars with protected designation of origin by headspace stir bar sorptive extraction. Food Res Int 2019; 123:298-310. [DOI: 10.1016/j.foodres.2019.04.071] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/29/2019] [Accepted: 04/30/2019] [Indexed: 10/26/2022]
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Ríos-Reina R, Callejón RM, Savorani F, Amigo JM, Cocchi M. Data fusion approaches in spectroscopic characterization and classification of PDO wine vinegars. Talanta 2019; 198:560-572. [PMID: 30876600 DOI: 10.1016/j.talanta.2019.01.100] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/25/2019] [Accepted: 01/29/2019] [Indexed: 11/24/2022]
Abstract
Spain is one of the major producers of high-quality wine vinegars having three protected designations of origin (a.k.a. PDOs): "Vinagre de Jerez", "Vinagre de Condado de Huelva" and "Vinagre de Montilla-Moriles". Their high prices due to their high quality and their high production costs explain the need for developing an adequate quality control technique and the interest in extensive characterization in order to capture the identity of each denomination. In this framework, methodologies based on non-targeted techniques, such as spectroscopies, are becoming popular in food authentication. Thus, for improving vinegar quality assessment, fusion of data blocks obtained from the same samples but different analytical techniques could be a good strategy, since the quantity and quality of sample knowledge could be enhanced providing new insights into the differentiation of vinegars. Therefore, the aim of this manuscript is the development of a multi-platform methodology and a model able to classify the Spanish wine vinegar PDOs. Sixty-five PDO wine vinegars were analyzed by four spectroscopic techniques: Fourier-transform mid-infrared spectroscopy (MIR), near infrared spectroscopy (NIR), multidimensional fluorescence spectroscopy (EEM) and proton nuclear magnetic resonance (1H-NMR). Two different data fusion strategies were evaluated: Mid-level data fusion with different preprocessing, and Common Component and Specific Weights analysis multiblock method. Exploratory and classification analysis on the data from individual techniques were also performed and compared with data fusion models. The data fusion models improved the classification, providing a more efficient differentiation, than the models based on single methods, and supporting the approach to combine these methods to achieve synergies for an optimized PDO differentiation.
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Affiliation(s)
- Rocío Ríos-Reina
- Dpto. de Nutrición y Bromatología, Toxicología y Medicina Legal, Facultad de Farmacia, Universidad de Sevilla, C/P. García González n°2, E-41012 Sevilla, Spain.
| | - Raquel M Callejón
- Dpto. de Nutrición y Bromatología, Toxicología y Medicina Legal, Facultad de Farmacia, Universidad de Sevilla, C/P. García González n°2, E-41012 Sevilla, Spain
| | - Francesco Savorani
- Department of Applied Science and Technology (DISAT), Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Torino, TO, Italy
| | - José M Amigo
- Chemometrics and Analytical Techniques, Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark
| | - Marina Cocchi
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Via Campi 103, 41125 Modena, Italy.
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