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- W2996606220 abstract "O objetivo deste trabalho foi utilizar a espectroscopia no infravermelho associada com a análise estatística multivariada para diferenciar as quantidades de componentes químicos presentes em chás verdes de agricultura convencional e agricultura orgânica, observando as diferentes concentrações químicas de cada amostra, provenientes de um mesmo produtor. Os espectros de infravermelho das amostras analisadas demostraram que existem bandas das amostras de chá verde de agricultura orgânica que são mais intensas comparadas com as de amostras de chá verde de agricultura convencional, sendo que a intensidade das bandas se relaciona com a quantidade dos componentes presentes na amostra analisada. A análise multivariada, PCA e análise de grupamentos mostrou que as regiões de número de onda em 1450, 1365, 1320, 1145, 1030, 825 cm-1, que representam principalmente os flavonoides e catequinas, apresentam picos mais intensos nas amostras de chá verde de agricultura orgânica quando comparadas com a de cultivo convencional. A combinação destas técnicas é rápida, econômica e eficaz, possibilitando um resultado seguro e de uso em todo tipo de cultivo.Palavras-chave: Espectro. Análise multivariada. Orgânico. Camellia sinensis.ABSTRACTThe objective of this work was to use infrared spectroscopy associated with multivariate statistical analysis to differentiate the quantities of chemical components present in green teas from conventional agriculture and organic agriculture, observing the different chemical concentrations of each sample, coming from the same producer. The infrared spectra of the analyzed samples showed that there are bands of the organic agriculture green tea samples that are more intense compared to the conventional agriculture green tea samples, and the intensity of the bands is related to the quantity of the components present in the sample. analyzed. Multivariate analysis, PCA and cluster analysis showed that the 1450, 1365, 1320, 1145, 1030, 825 cm-1 wavelength regions, which represent mainly flavonoids and catechins, show more intense peaks in green tea samples. compared to conventional farming. The combination of these techniques is fast, inexpensive and effective, enabling a safe and useful result in all types of crops.Keywords: Spectrum. Multivariate analysis. Organic. Camellia sinensis." @default.
- W2996606220 created "2019-12-26" @default.
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- W2996606220 date "2019-12-20" @default.
- W2996606220 modified "2023-09-29" @default.
- W2996606220 title "ESPECTROSCOPIA NO INFRAVERMELHO COMO FERRAMENTA PARA DIFERENCIAÇÃO DE CHÁ VERDE DE AGRICULTURA ORGÂNICA E CONVENCIONAL" @default.
- W2996606220 doi "https://doi.org/10.25112/rtt.v10i2.1968" @default.
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