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Potential of X-Ray Spectrometry and Chemometrics to Discriminate Organic from Conventional Grown Agricultural Products 21
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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