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Potential of X-Ray Spectrometry and Chemometrics to Discriminate Organic from Conventional Grown Agricultural Products Organic Eprints
Bortoleto, Gisele G.; De Nadai Fernandes, Elisabete A.; Tagliaferro, Fábio S.; Ferrari, Angela A.; Bueno, Maria Izabel M. S..
This work describes an innovative analytical method based on X-ray spectrometry combined with chemometrics which presents high potential to discriminate conventional from organic grown tomatoes and coffee beans. This novelty is based on the irradiation of samples in a bench-top EDXRF equipment provided with a Rh tube and further treatment of the spectral data using Principal Component Analysis (PCA). Multivariate analysis results showed a tendency in separating the samples according to the production mode (organic or conventional). Regarding the spectra obtained, the K alpha peak of potassium showed to be the most responsible for discriminating different categories of samples. The chlorine K-alpha peak presented high capability in discriminating tomato and...
Tipo: Conference paper, poster, etc. Palavras-chave: Food security; Food quality and human health Markets and trade.
Ano: 2008 URL: http://orgprints.org/12348/1/Bortoleto_12348_ed.doc
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Shaded Coffee: A way to Increase Sustainability in Brazilian Organic Coffee plantations Organic Eprints
Moreira, Cassio Franco; De Nadai Fernandes, Elisabete A.; Tagliaferro, Fábio Sileno.
Consumption of specialty coffee, mainly organic coffee, increases worldwide following the tendency of consuming social and ecological sustainable products. Brazil is the world largest coffee producer, with an average of 2,300,000 tons of green coffee in the last 5 years. Cultivation of organic coffee and shaded coffee are common in Central America, while in Brazil both conventional and organic coffee are cultivated in the full sun system. The full sun system is criticized due to the lack of biodiversity and high demand for inputs. Shaded coffee system has more biodiversity, recycles and fix more chemical elements, such as N, P, K, Ca and C, having a great potential to mitigate the global warming, being consequently more sustainable. In Brazil, shaded...
Tipo: Conference paper, poster, etc. Palavras-chave: Biodiversity and ecosystem services.
Ano: 2008 URL: http://orgprints.org/12399/1/Moreira_12399_ed.doc
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