999 resultados para Nápole, Gabriel Marcelo
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Preprint
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A method for HPLC determination of sulfadimethoxyne in milk is presented. The analyte isolation and concentration were performed by solid-phase extraction through a C-8 cartridge, pre-conditioned with hexane, methanol and water and eluted with MeOH. The recovery determination was done with a spiked solution of 20, 50 or 100 µg L-1. In this concentration range, the recovery was 83.2% with a RDS of 15.4%. For quantification, a Zorbax Eclipse XDB-C8 (4.6 mm x 150 mm, 5 µm), a mobile phase of MeCN: 0.01 mol L-1 KH2PO4 aq. (1:4), and a variable wavelength detector (275 nm) were used.
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The multilayer perceptron network was used to classify the gasoline. The main parameters used in the classification were established by the Ordinance nº 309 of the Agência Nacional do Petróleo, but without informing the network the legal limits of these parameters. The network used had 10 neurons in a single hidden layer, learning rate of 0.04 and 250 training epochs. The application of artificial neural network served classify 100% of the commercialized gas in the region of Londrina-PR and to identify the tampered gasoline even those suspected of tampering.
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Variante(s) de titre : La Société nouvelle
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1897 (A1,T1,VOL1).
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1902/10 (A6,N45).
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1902/05 (A6,N47).
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1900/01 (A4,T1,VOL6)-1900/06.
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1900 (A4,T2,VOL7).
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1899 (A3,T2,VOL5).
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1901 (A5,T2,VOL8).
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1898 (A2,T1,VOL2).
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1899 (A3,T1,VOL4).
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1898 (A2,T2,VOL3).
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1903 (A7,VOL9).
