Search Results - "Ferreira, S.L.C."

Application of polyurethane foam as a sorbent for trace metal pre-concentration — A review by Lemos, V.A., Santos, M.S., Santos, E.S., Santos, M.J.S., dos Santos, W.N.L., Souza, A.S., de Jesus, D.S., das Virgens, C.F., Carvalho, M.S., Oleszczuk, N., Vale, M.G.R., Welz, B., Ferreira, S.L.C.

“…The first publication on the use of polyurethane foam (PUF) for sorption processes dates back to 1970, and soon after the material was applied for separation…”
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A pre-concentration procedure using coprecipitation for determination of lead and iron in several samples using flame atomic absorption spectrometry by Saracoglu, S., Soylak, M., Peker, D.S. Kacar, Elci, L., dos Santos, W.N.L., Lemos, V.A., Ferreira, S.L.C.

“…The present paper proposes a pre-concentration procedure for determination of lead and iron in several samples by flame atomic absorption spectrometry. In it,…”
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Factorial design for multivariate optimization of an on-line preconcentration system for platinum determination by ultrasonic nebulization coupled to inductively coupled plasma optical emission spectrometry by Cerutti, S, Salonia, J.A, Ferreira, S.L.C, Olsina, R.A, Martinez, L.D

“…A system for on-line preconcentration and determination of platinum by ultrasonic nebulization (USN) coupled to inductively coupled plasma optical emission…”
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Box-Behnken design: An alternative for the optimization of analytical methods by Ferreira, S.L.C., Bruns, R.E., Ferreira, H.S., Matos, G.D., David, J.M., Brandão, G.C., da Silva, E.G.P., Portugal, L.A., dos Reis, P.S., Souza, A.S., dos Santos, W.N.L.

“…The present paper describes fundamentals, advantages and limitations of the Box-Behnken design (BBD) for the optimization of analytical methods. It establishes…”
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Editorial by Ferreira, S.L.C

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Guest editor's biography by Ferreira, S.L.C

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Inorganic As speciation and bioavailability in estuarine sediments of Todos os Santos Bay, BA, Brazil by Hatje, V., Macedo, S.M., de Jesus, R.M., Cotrim, G., Garcia, K.S., de Queiroz, A.F., Ferreira, S.L.C.

“…► Total concentration of As at several stations along Todos os Santos Bay, was above TEL value. ► At Subaé and Paraguaçu systems, As (V) was the dominant…”
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Method development for the determination of manganese in wheat flour by slurry sampling flame atomic absorption spectrometry by Araujo, Rennan G.O., Dias, Fábio de S., Macedo, Samuel M., Santos, Walter N.L. dos, Ferreira, Sérgio L.C.

“…The wheat is one of the cereals more consumed in the human food in all worlds. In the form of flour it is used for preparation of breads, cookies, pizzas,…”
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Statistical mixture design development of digestion methods for Oyster tissue using inductively coupled plasma optical emission spectrometry for the determination of metallic ions by Nano, R.M.W., Bruns, R.E., Ferreira, S.L.C., Baccan, N., Cadore, S.

“…The quantitative determination of chemical elements in organic or biological samples is an important analytical problem. Normally the elements to be determined…”
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Fast method for the determination of copper, manganese and iron in seafood samples by da Silva, Erik G.P., Hatje, Vanessa, dos Santos, Walter N.L., Costa, Letícia M., Nogueira, Ana R.A., Ferreira, Sérgio L.C.

“…A slurry sampling flame atomic absorption spectrometric method is proposed for the determination of copper, manganese and iron in oysters ( Crassostrea…”
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Use of factorial design and Doehlert matrix for multivariate optimisation of an on-line preconcentration system for lead determination by flame atomic absorption spectrometry by Ferreira, S L C, dos Santos, W N L, Bezerra, M A, Lemos, V A, Bosque-Sendra, J M

“…A system for on-line preconcentration and determination of lead by flame atomic absorption spectrometry (FAAS) was proposed. It was based on the sorption of…”
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Optimization of the preconcentration system of cadmium with 1(2-thiazolylazo)- p-cresol using a knotted reactor and flame atomic absorption spectrometric detection by Cerutti, S, Ferreira, S.L.C, Gásquez, J.A, Olsina, R.A, Martinez, L.D

“…The present paper proposes an on-line preconcentration procedure for cadmium determination in drinking water samples. It is based on the precipitation of…”
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