Výsledky vyhledávání - "Iolanda A. Rufini"

Determination of inorganic nutrients in wheat flour by laser-induced breakdown spectroscopy and energy dispersive X-ray fluorescence spectrometry

Autor: Lidiane Cristina Nunes, Eduardo Simões de Almeida, Gabriel Gustinelli Arantes de Carvalho, Iolanda A. Rufini, Lidiane Cristina Peruchi, Dário Santos, Marcelo Braga Bueno Guerra, Francisco José Krug

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 100:129-136

Laser-induced breakdown spectroscopy (LIBS) and energy dispersive X-ray fluorescence spectrometry (EDXRF) were evaluated for the determination of P, K, Ca, Mg, S, Fe, Cu, Mn and Zn in pressed pellets of wheat flours. EDXRF and LIBS calibration models

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86221344ca721eb9ee8aa8b5ab88f6c9
https://doi.org/10.1016/j.sab.2014.08.025

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Laser-induced breakdown spectroscopy and chemometrics for classification of toys relying on toxic elements

Autor: Francisco José Krug, Flavio de Oliveira Leme, Lilian C. Trevizan, Edenir R. Pereira Filho, Iolanda A. Rufini, Dário Santos, Quienly Godoi

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 66:138-143

Quality control of toys for avoiding children exposure to potentially toxic elements is of utmost relevance and it is a common requirement in national and/or international norms for health and safety reasons. Laser-induced breakdown spectroscopy (LIB

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0649105fcd1259db7731eeedb504b52b
https://doi.org/10.1016/j.sab.2011.01.001

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Comparison of univariate and multivariate calibration for the determination of micronutrients in pellets of plant materials by laser induced breakdown spectrometry

Autor: Iolanda A. Rufini, Jez Willian Batista Braga, Dário Santos, Francisco José Krug, Lilian C. Trevizan, Lidiane Cristina Nunes

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 65:66-74

The application of laser induced breakdown spectrometry (LIBS) aiming the direct analysis of plant materials is a great challenge that still needs efforts for its development and validation. In this way, a series of experimental approaches has been c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5adb337da71fe9b73386b6a5b608c9aa
https://doi.org/10.1016/j.sab.2009.11.007

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Preliminary studies of laser-induced breakdown spectrometry for the determination of Ba, Cd, Cr and Pb in toys

Autor: Dário Santos, Iolanda A. Rufini, Francisco José Krug, Quienly Godoi, José Augusto Marcondes Agnelli, Flavio de Oliveira Leme, Lidiane Cristina Nunes, Lilian C. Trevizan

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 64:573-581

The performance of laser-induced breakdown spectrometry (LIBS) for the determination of Ba, Cd, Cr and Pb in toys has been evaluated by using a Nd:YAG laser operating at 1064 nm and an Echelle spectrometer with intensified charge-coupled device detec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d3de7f2c20f6e5108b2063f7aef81702
https://doi.org/10.1016/j.sab.2009.05.003

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Evaluation of laser induced breakdown spectroscopy for the determination of macronutrients in plant materials

Autor: Nilson Dias Vieira, Lilian C. Trevizan, Ricardo E. Samad, Iolanda A. Rufini, Lidiane Cristina Nunes, Francisco José Krug, Dário Santos

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 63:1151-1158

Laser induced breakdown spectroscopy (LIBS) has become an analytical tool for the direct analysis of a large variety of materials in order to provide qualitative and/or quantitative information. However, there is a lack of information for LIBS analys

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76d42ab71bf35bb7bd91fd0ad449af74
https://doi.org/10.1016/j.sab.2008.08.005

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Cadmium and lead determination in foods by beam injection flame furnace atomic absorption spectrometry after ultrasound-assisted sample preparation

Autor: A. C. Tomazelli, Iolanda A. Rufini, Dário Santos Júnior, Francisco José Krug, Harald Berndt, Poliana Carolina Aleixo

Publikováno v: Analytica Chimica Acta. 512:329-337

A simple method for cadmium and lead determination in foods by beam injection flame furnace atomic absorption spectrometry (BIFF-AAS) was proposed. Food slurries were prepared by transferring an exact amount of cryogenic-ground homogenized material (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba3eaa3c184a405829dc869e15a7d722
https://doi.org/10.1016/j.aca.2004.02.049

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Surface and gas phase temperatures of a tungsten coil atomizer

Autor: Francisco José Krug, Zilvanir F Queiroz, Joaquim A. Nóbrega, Iolanda A. Rufini, Samuel Simião de Sousa, Pedro Vitoriano de Oliveira, Cíntia S. Silva

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 57:1789-1799

The electrothermal atomization of elements is critically affected by the volatility of the analyte and its compounds, the matrix constituents, the atomizer material and the surface and gas phase temperatures. There are scarce temperature data about t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87557d122275f2810ed0fc00adb64cbc
https://doi.org/10.1016/s0584-8547(02)00146-5

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The use of ion exchange resin for reagent immobilization and concentration in flow systems: determination of nickel in steel alloys and iron speciation in waters

Autor: Iolanda A. Rufini, Patrícia B. Martelli, Boaventura F. Reis, Mauro Korn

Publikováno v: Journal of the Brazilian Chemical Society, Volume: 8, Issue: 5, Pages: 479-485, Published: 1997
Journal of the Brazilian Chemical Society v.8 n.5 1997
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ

Flow injection systems employing potassium peroxydisulphate as oxidizing reagent, immobilized on the anionic exchange resin AG1-X8 are proposed for spectrophotometric determination of nickel in steel alloys and for the speciation of iron (III)/iron (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::825dc7171d044ea0061363dc67c479b4
https://doi.org/10.1590/s0103-50531997000500008

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A flow system with an electrochemical reduction cell for spectrophotometric determinations of major constituents in Fe/V alloys

Autor: A.O. Jacintho, Maria Fernanda Giné, Iolanda A. Rufini, Luiz F.R Machado, Amauri A. Menegário

Publikováno v: Talanta. 50(2)

Insertion of an electrochemical cell in a flow injection system to evaluate the on-line reduction of ionic species is presented. The cell comprised Pt electrodes installed in two sections separated by a Nafion membrane. The sample was injected into a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58459ed992dc028ea40401339b57009a
https://pubmed.ncbi.nlm.nih.gov/18967714

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