Quality of Coffea Arabica L. beans that emit fluorescence when subjected to ultraviolet light
DOI:
https://doi.org/10.33448/rsd-v12i8.42930Keywords:
UV light; Coffee; Quality control.Abstract
The demand for specialty coffees on the world market is growing, and their commercial value is directly linked to their quality. When subjected to ultraviolet (UV) light, some raw coffee beans show a blue fluorescence. Around the world, producers and traders have used UV light as a quality analysis method to detect defects in beans that cannot be seen with the naked eye. Despite being a technique used for a long time, almost no scientific study has been done to confirm and clarify the matter. Therefore, the work aims to evaluate the quality of the beans that emit and do not emit fluorescence from the same batch. For this, a batch of natural specialty coffee was divided into treatments with different fluorescence concentrations and analyzed sensorially and physicochemically. It was observed that the increase in fully fluorescent beans concentration negatively affected the coffee final score and astringency, and the increase in partially fluorescent beans concentration negatively affected the final score, astringency, sweetness, acidity, bitterness, and aftertaste of the coffee. Furthermore, attributes such as fruity notes and sweetness were affected by the presence of fluorescence, thus changing the sensory profile. In the physicochemical analyses, a reduction in the coffee quality was observed for the parameters of potassium leaching, electrical conductivity, fatty acidity, polyphenols, titratable acidity, moisture and weight of 1000 seeds. Therefore, it was possible to observe that the use of UV light to assess the green coffee beans quality can be a viable method.
References
Abrahão, S. A., Pereira, R. G. F. A., Duarte, S. M. da S., Lima, A. R., Alvarenga, D. J., & Ferreira, E. B. (2010). Compostos bioativos e atividade antioxidante do café (Coffea arabica L.). Ciência e Agrotecnologia, 34(2), 414-420. https://doi.org/10.1590/S1413-70542010000200020
Afonso Júnior, P. C., & Corrêa, P. C. (2003). Influência do tempo de armazenagem na cor dos grãos de café pré-processados por “via seca” e “via úmida.” Ciência e Agrotecnologia, 27(6), 1268-1276. https://doi.org/10.1590/S1413-70542003000600010
American Association of Cereal Chemists. (1995). Approved Methods of Analysis (Vol. 1). https://www.cerealsgrains.org/resources/methods/Pages/default.asp
Angélico, C. Li. (2008). Qulidade do café (Coffea arabica L.) em diferentes estádios de maturação e submetido a cinco tempos de ensacamento antes da secagem. http://www.livrosgratis.com.br
Association of Official Analytical Chemists. (1990). Official methods of analysis of the Association of Official Analytica Chemists (15 ed.). Association of Official Analytical Chemists.
Banks, M., McFadden, C., & Atkinson, C. (1999). World encyclopedia of coffee. Anness Publishing Limited.
Barbosa, M. de S. G., Scholz, M. B. dos S., Kitzberger, C. S. G., & Benassi, M. de T. (2019). Correlation between the composition of green Arabica coffee beans and the sensory quality of coffee brews. Food Chemistry, 292, 275-280. https://doi.org/10.1016/j.foodchem.2019.04.072
Borém, F. M., Coradi, P. C., Saath, R., & Oliveira, J. A. (2008). Qualidade do café natural e despolpado após secagem em terreiro e com altas temperaturas. Ciência e Agrotecnologia, 32(5), 1609-1615. https://doi.org/10.1590/S1413-70542008000500038
Borém, F. M., Ribeiro, F. C., Figueiredo, L. P., Giomo, G. S., Siqueira, V. C., & Dias, C. A. (2019). Sensory analysis and fatty acid profile of specialty coffees stored in different packages. Journal of Food Science and Technology, 56(9), 4101-4109. https://doi.org/10.1007/s13197-019-03879-3
Brasil. (2003). Instrução Normativa n. 8. Regulamento Técnico de Identidade e de Qualidade para a Classificação do Café Beneficiado Grão Cru. MAPA.
Brasil. (2009). Regras para analise de sementes. In Ministério da Agricultura e Reforma Agrária. MAPA. https://www.gov.br/agricultura/pt-br/assuntos/insumos-agropecuarios/arquivos-publicacoes-insumos/2946_regras_analise__sementes.pdf
Brooker, D. B., Bakker-Arkema, F. W., Hall, C. H. (1992). Drying and storage of grains and oilseeds. Westport: AVI.
Bryman, H. (2019). The extraction comes clean under ulttraviolet light. Daily Coffee News. https://dailycoffeenews.com/2019/03/08/the-extraction-comes-clean-under-ultraviolet-light/
Caporaso, N., Whitworth, M. B., Grebby, S., & Fisk, I. D. (2018). Rapid prediction of single green coffee bean moisture and lipid content by hyperspectral imaging. Journal of Food Engineering, 227, 18-29. https://doi.org/10.1016/j.jfoodeng.2018.01.009
Carter, H. J. (1980). Coffee sorting with UV excitation. In Paris: Association Scientifique Internationale du Café (Ed.). Proceedings of the 9th International Scientific Colloquium on Coffee (p. 219226). Paris: Association Scientifique Internationale du Café.
Carvalho, V. D. de, Chagas, S. J. de R., Chalfoun, S. M., Botrel, N., & Juste Júnior, E. S. G. (1994). Relação entre a composição físico-química do grão beneficiado e a qualidade de bebida do café. Pesquisa Agropecuária Brasileira, 29(3), 449-454.
Choi, T. (2019). Shining a light on defect detection: How a $9 UV torch could one of the best investments for the coffee value chain. Caravela Coffee. https://caravela.coffee/project/shining-a-light-on-defect-detection-how-a-9-uv-torch-could-be-one-of-the-best-investments-for-the-coffee-value-chain/
Coffee damage under UV light. (2009). Sweet Marias’s Coffee Library. https://library.sweetmarias.com/coffee-damage-under-uv-light/
Coffee Quality-Improvement Programme – Modifications (2004). https://www.ico.org/documents/iccres420e.pdf
Coradi, P. C., Borém, F. M., & Oliveira, J. A. (2008). Qualidade do café natural e despolpado após diferentes tipos de secagem e armazenamento. Revista Brasileira de Engenharia Agrícola e Ambiental, 12(2), 181-188. https://doi.org/10.1590/S1415-43662008000200011
Duarte, G. S., Pereira, A. A., & Farah, A. (2010). Chlorogenic acids and other relevant compounds in Brazilian coffees processed by semi-dry and wet post-harvesting methods. Food Chemistry, 118(3), 851-855. https://doi.org/10.1016/J.FOODCHEM.2009.05.042
Farah, A., & Donangelo, C. M. (2006). Phenolic compounds in coffee. Braz. J. Plant Physiol, 18(1), 23-36.
Farah, A., Monteiro, M. C., Calado, V., Franca, A. S., & Trugo, L. C. (2006). Correlation between cup quality and chemical attributes of Brazilian coffee. Food Chemistry, 98(2), 373-380. https://doi.org/10.1016/j.foodchem.2005.07.032
Feran, C. (2020). Under the blacklight (“The UV light post”). Christopher Feran Blog. https://christopherferan.com/2020/03/14/under-the-blacklight/
Ferreira, D. F. (2011). Sisvar: a computer statistical analysis system. Ciência e Agrotecnologia, 35(6), 1039-1042. https://doi.org/10.1590/S1413-70542011000600001
Ferreira, G. F. P. (2010). Avaliação da qualidade física, química, sensorial e da composição fúngica de grãos de cafés beneficiados.
Figueiredo, A. C. da S., Barroso, J. M. G., Pedro, L. M. G., & Ascensão, L. (2007). Histoquímica e citoquímica em plantas: princípios e protocolos.
Figueiredo, L. P. (2010). Perfil sensorial e químico de genótipos de cafeeiro Bourbon de diferentes origens geográficas.
Franca, A. S., Mendonça, J. C. F., & Oliveira, S. D. (2005). Composition of green and roasted coffees of different cup qualities. LWT - Food Science and Technology, 38(7), 709-715. https://doi.org/10.1016/j.lwt.2004.08.014
Freitas, M. N., da Rosa, S. D. V. F., Pereira, C. C., Malta, M. R., & Dias, C. T. D. S. (2020). Identification of physiological analysis parameters associated with coffee beverage quality. Ciencia e Agrotecnologia, 44, 1-14. https://doi.org/10.1590/1413-7054202044031019
Gadelha, A. J. F., Rocha, C. O. da, Vieira, F. F., & Ribeiro, G. do N. (2009). Avaliação de parâmetros de qualidade físico-químicos de polpas congeladas de abacaxi, cajá e caju. Revista Caatinga, 22(1), 115-118. https://periodicos.ufersa.edu.br/index.php/caatinga/article/view/1012
Galova, V. (2020). How to evaluate the quality of your coffee. Part 1: Green Bean Evaluation. Roest Coffee. https://www.roestcoffee.com/roestblog/quality-control-part1
García-Plazaola, J. I., Fernández-Marín, B., Duke, S. O., Hernández, A., López-Arbeloa, F., & Becerril, J. M. (2015). Autofluorescence: Biological functions and technical applications. Plant Science, 236, 136-145. https://doi.org/10.1016/j.plantsci.2015.03.010
Gibson, A., & Butty, M. (1975). Overfermented Coffee Beans (“Stinkers”): A method for their detection and elimination. In Paris: Association Scientifique Internationale du Café (Ed.), Proceedings of the 7th International Scientific Colloquium on Coffee. Paris: Association Scientifique Internationale du Café. 141-152.
Gourlart, P. de F. P., Alevs, J. D., Castro, E. M. de, Fries, D. D., Magalhães, M. M., & Melo, H. C. de. (2007). Aspectos histoquímicos e morfológicos de grãos de café de diferentes qualidades. Ciência Rural, 37(3), 662-666.
Guimarães, E. R., Leme, P. H. M. V., de Rezende, D. C., Pereira, S. P., & dos Santos, A. C. (2019). The brand new Brazilian specialty coffee market. Journal of Food Products Marketing, 25(1), 49-71. https://doi.org/10.1080/10454446.2018.1478757
International Organization for Standardization. (2003). Green coffee — Determination of loss in mass at 105 degrees C - ISO. ISO - ISO 6673:2003. https://www.iso.org/standard/38375.html
Kreuml, M. T. L., Majchrzak, D., Ploederl, B., & Koenig, J. (2013). Changes in sensory quality characteristics of coffee during storage. Food Science & Nutrition, 1(4), 267. https://doi.org/10.1002/FSN3.35
Lingle, T. R. (2011). The coffee cupper’s handbook: systematic guide to the sensory evaluation of coffee’s flavor (Specialty Coffee Association of America, Ed.; Fourth edition). https://search.library.wisc.edu/catalog/9910206434502121
Malta, M. R., Pereira, R. G. F. A., & Chagas, S. J. de R. (2005). Condutividade elétrica e lixiviação de potássio do exsudado de grãos de café: alguns fatores que podem influenciar essas avaliações. Ciência e Agrotecnologia, 29(5), 1015-1020.
Marques, E. R., Borém, F. M., Pereira, R. G. F. A., & Biaggioni, M. A. M. (2008). Eficácia do teste de acidez graxa na avaliação da qualidade do café Arábica (Coffea arabica L.) submetido a diferente períodos e temperaturas de secagem. Ciência e Agrotecnologia, 32(5), 1557-1562.
Nobre, G. W. (2005). Alterações qualitativas do café cereja descascado durante o armazenamento.
Oliveira, E. M., Fonseca, R. G., Rodarte, M. P., & Barbosa, B. H. G. (2011). Integridade dos grãos de café arábica avaliada por meio de fotometria. 37o Congresso Brasileiro de Pesquisas Cafeeiras.
Oliveira, P. D., Borém, F. M., Isquierdo, E. P., Giomo, G. da S., de Lima, R. R., & Cardoso, R. A. (2013). Physiological aspects of coffee beans, processed and dried through different methods, associated with sensory quality. Coffee Science, 8(2), 203-211.
Our green bean quality. (n.d.). The Barn. Retrieved February 8, 2022, from https://thebarn.de/pages/green-grading-part-2
Ozbekova, Z., & Kulmyrzaev, A. (2019). Study of moisture content and water activity of rice using fluorescence spectroscopy and multivariate analysis. Spectrochimica Acta ¬– Part A: Molecular and Biomolecular Spectroscopy, 223. https://doi.org/10.1016/j.saa.2019.117357
Pate, A. (2019). Using UV light for quality control in coffee roasting. Perfect Daily Grind. https://perfectdailygrind.com/2019/03/using-uv-light-for-quality-control-in-coffee-roasting/
Pavoni, J. F., Neves-Junior, W. F. P., Spiropulos, M. A., & de Araújo, D. B. (2014). Uma montagem experimental para a medida de fluorescência. Revista Brasileira de Ensino de Física, 36(4). https://doi.org/10.1590/S1806-11172014000400018
Pereira, R. G. F. A., Carvalho, E. M., Tavares, K. M., Rodarte, M. P., & Batista, L. R. (2008). Avaliação da Emissão de Fluorescência em Grãos de Café Submetidos a Impactos Mecânicos Induzidos: Congresso Brasileiro de Pesquisas Cafeeiras, 367-367.
Pimenta, C. J. (2001). Época de colheita e tempo de permanência dos frutos à espera da secagem, na qualidade dos frutos do café (Coffea arabica L.). http://www.sbicafe.ufv.br/handle/123456789/382
Pimenta, C. J. (2003). Qualidade do Café.
Prete, C. E. C. (1992). Condutividade elétrica do exsudato de grãos de café (Coffea arabica L.) e sua relação com a qualidade da bebida.
Rabelo, M. H. S., Borém, F. M., Lima, R. R. de, Alves, A. P. de C., Pinheiro, A. C. M., Ribeiro, D. E., Santos, C. M. dos, & Pereira, R. G. F. A. (2021). Impacts of quaker beans over sensory characteristics and volatile composition of specialty natural coffees. Food Chemistry, 342. https://doi.org/10.1016/j.foodchem.2020.128304
Ramalakshmi, K., Kubra, I. R., & Rao, L. J. M. (2007). Physicochemical characteristics of green coffee: Comparison of graded and defective beans. Journal of Food Science, 72(5). https://doi.org/10.1111/j.1750-3841.2007.00379.x
Ramos, M. F., Ribeiro, D. E., Cirillo, M. Â., & Borém, F. M. (2016). Discrimination of the sensory quality of the Coffea arabica L. (cv. Yellow Bourbon) produced in different altitudes using decision trees obtained by the CHAID method. Journal of the Science of Food and Agriculture, 96(10), 3543–3551. https://doi.org/10.1002/jsfa.7539
Reh, C. T., Gerber, A., Prodolliet, J., & Vuataz, G. (2006). Water content determination in green coffee - Method comparison to study specificity and accuracy. Food Chemistry, 96(3), 423-430. https://doi.org/10.1016/j.foodchem.2005.02.055
Reinato, C. H. R., Borem, F. M., Cirillo, M. Â., & Oliveira, E. C. (2012). Qualidade do café secado em terreiros com diferentes pavimentações e espessuras de camada. Coffee Science, 7(3), 223-237. http://www.sbicafe.ufv.br/handle/123456789/7919
Ribeiro, F. C. (2013). Métodos alternativos para armazenamento de cafés especiais.
Ribeiro, F. C., Borém, F. M., Giomo, G. S., de Lima, R. R., Malta, M. R., & Figueiredo, L. P. (2011). Storage of green coffee in hermetic packaging injected with CO2. Journal of Stored Products Research, 47(4), 341-348. https://doi.org/10.1016/j.jspr.2011.05.007
Roshchina, V. v. (2012). Vital Autofluorescence: Application to the Study of Plant Living Cells. International Journal of Spectroscopy, 14, 2012. https://doi.org/10.1155/2012/124672
Santos, S. B. dos. (2011). Biorefinaria de pinhão-manso (Jatropha curcas L.): armazenamento, extração de óleo e produção sustentável de biodiesel com etanol. Universidade Federal de Viçosa. https://locus.ufv.br//handle/123456789/701
Santos, M. A., Chalfoun, S. M., & Pimenta, C. J. (2009). Influência do processamento por via úmida e tipos de secagem soobre a composição, físico química e química do café (Coffea arabica L). Ciência e Tecnologia de Alimentos, 33(1), 213-218.
SCA. (2018). Protocols & Best Pratices. Specialty Coffee Association. https://sca.coffee/research/protocols-best-practices/
Scholz, M. B. dos S., Figueiredo, V. R. G. de, Silva, J. V. N. da, & Kitzberger, C. S. G. (2013). Sensory atributes and physico-chemical characteristics of the coffee beverage from the IAPAR cultivars. Coffee Science, 8(1), 6-16. http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/297
Silva, E. A., Mazzafera, P., Brunini, O., Sakai, E., Arruda, F. B., Mattoso, L. H. C., Carvalho, C. R. L., & Pires, R. C. M. (2005). The influence of water management and environmental conditions on the chemical composition and beverage quality of coffee beans. Brazilian Journal of Plant Physiology, 17(2), 229-238. https://doi.org/10.1590/S1677-04202005000200006
Singleton, V. L.; Rossi, J. A. (1965). Colorimetry of Total Phenolics with Phosphomolybdic-Phosphotungstic Acid Reagents. American Journal of Enology and Viticulture, 16, 144-158.
Siqueira, H. H. de, & Abreu, C. M. P. de. (2006). Composição físico-química e qualidade do café submetido a dois tipos de torração e com diferentes formas de processamento. Ciência e Agrotecnologia, 30(1), 112-117. https://doi.org/10.1590/S1413-70542006000100016
Soares, T. A. (2003). Análise de acidez graxa como índice de qualidade em grãos de soja. http://hdl.handle.net/11449/90539
Spencer, M., Sage, E., Velez, M., & Guinard, J. X. (2016). Using Single Free Sorting and Multivariate Exploratory Methods to Design a New Coffee Taster’s Flavor Wheel. Journal of Food Science, 81(12), S2997-S3005. https://doi.org/10.1111/1750-3841.13555
Sunarharum, W. B., Williams, D. J., & Smyth, H. E. (2014). Complexity of coffee flavor: A compositional and sensory perspective. In Food Research International, 62, 315-325. Elsevier Ltd. https://doi.org/10.1016/j.foodres.2014.02.030
Tavares, K. M., Pereira, R. G. F., Rodarte, M. P., Carvalho, E. M., Batista Pereira, L. R., & Machado, J. C. (2008). Métodos para Avaliação da Qualidade do Café com Indução de Injúrias em Grãos pela Elevação do Teor de Água. Congresso Brasileiro de Pesquisas Cafeeiras, 208-208.
Tsegay, G., Redi-Abshiro, M., Chandravanshi, B. S., Ele, E., Mohammed, A. M., & Mamo, H. (2020). Effect of altitude of coffee plants on the composition of fatty acids of green coffee beans. BMC Chemistry, 14(1), 1-11. https://doi.org/10.1186/S13065-020-00688-0/TABLES/5
Ufer, D., Lin, W., & Ortega, D. L. (2019). Personality traits and preferences for specialty coffee: Results from a coffee shop field experiment. Food Research International, 125. https://doi.org/10.1016/j.foodres.2019.108504
Vieira, G., Silva, J. N. da, Vilela, E. R., & Silva, J. de S. e. (2001). Avaliação da qualidade de café beneficiado armazenado em sil com e sem aeração e em sacos de juta. Revista Brasileira de Produtos Agroindustriais, 3(1), 75-90.
Vinecky, F., Davrieux, F., Mera, A. C., Alves, G. S. C., Lavagnini, G., Leroy, T., Bonnot, F., Rocha, O. C., Bartholo, G. F., Guerra, A. F., Rodrigues, G. C., Marraccini, P., & Andrade, A. C. (2017). Controlled irrigation and nitrogen, phosphorous and potassium fertilization affect the biochemical composition and quality of Arabica coffee beans. Journal of Agricultural Science, 155(6), 902-918. https://doi.org/10.1017/S0021859616000988
Wintgens, J. N. (2008). Factors Influencing the Quality of Green Coffee. In Coffee: Growing, Processing, Sustainable Production: A Guidebook for Growers, Processors, Traders, and Researchers. John Wiley & Sons, Ltd. https://doi.org/10.1002/9783527619627.CH29
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