Search Results - "Amais, Renata S"

Reactivity and analytical performance of oxygen as cell gas in inductively coupled plasma tandem mass spectrometry by Virgilio, Alex, Amais, Renata S., Amaral, Clarice D.B., Fialho, Lucimar L., Schiavo, Daniela, Nóbrega, Joaquim A.

“…The reactivity and analytical performance of O2 as cell gas in inductively coupled plasma tandem mass spectrometry was investigated. Selected analytes in a…”
Get full text

Dilute-and-Shoot Procedure for Determination of As, Cr, P, Pb, Si, and V in Ethanol Fuel by Inductively Coupled Plasma Tandem Mass Spectrometry by Virgilio, Alex, Amais, Renata S, Schiavo, Daniela, Nóbrega, Joaquim A

“…A method for determination of As, Cr, P, Pb, Si, and V in ethanol fuel by inductively coupled plasma tandem mass spectrometry (ICP–MS/MS) is described. Samples…”
Get full text

Application of the interference standard method for the determination of sulfur, manganese and iron in foods by inductively coupled plasma mass spectrometry by Amais, Renata S., Donati, George L., Nóbrega, Joaquim A.

“…[Display omitted] ► Argon species in the plasma are used to correct for spectral interferences in ICP-QMS. ► The interference standard method (IFS)…”
Get full text

Trace elements distribution in tropical tree rings through high-resolution imaging using LA-ICP-MS analysis by Amais, Renata S., Moreau, Pedro S., Francischini, Danielle S., Magnusson, Rafael, Locosselli, Giuliano M., Godoy-Veiga, Milena, Ceccantini, Gregório, Ortega Rodriguez, Daigard R., Tomazello-Filho, Mario, Arruda, Marco A.Z.

“…•Elemental distribution images in wood surface of tropical tree species were built.•Parenchyma, fiber and vessel present different trace element…”
Get full text

Tandem mass spectrometry (ICP-MS/MS) for overcoming molybdenum oxide interferences on Cd determination in milk by Amais, Renata S., Virgilio, Alex, Schiavo, Daniela, Nóbrega, Joaquim A.

“…It is well known that molybdenum oxides affect Cd determination by inductively coupled plasma mass spectrometry (ICP-MS). It is proposed here a procedure for…”
Get full text

A simple dilute-and-shoot procedure for Si determination in diesel and biodiesel by microwave-induced plasma optical emission spectrometry by Amais, Renata S., Donati, George L., Schiavo, Daniela, Nóbrega, Joaquim A.

“…In the present work, microwave-induced plasma optical emission spectrometry (MIP OES) and the flow blurring nebulizer (FBN) technology are used to determine…”
Get full text

Determination of Ca, Mg, and Zn in biodiesel microemulsions by FAAS using discrete nebulization by Amais, Renata S., Garcia, Edivaldo E., Monteiro, Marcos R., Nóbrega, Joaquim A.

“…► Discrete nebulization was used for microemulsion introduction by FAAS. ► Calcium, Mg and Zn were determined in biodiesel microemulsions. ► Sensitivities were…”
Get full text

Time Domain-NMR Combined with Chemometrics Analysis: An Alternative Tool for Monitoring Diesel Fuel Quality by Santos, Poliana M, Amais, Renata S, Colnago, Luiz A, Rinnan, Åsmund, Monteiro, Marcos R

“…Time-domain nuclear magnetic resonance (TD-NMR) was explored as a rapid method for simultaneous assessment of the quality parameters in commercial diesel…”
Get full text

Determination of carbon in digested samples and amino acids by inductively coupled plasma tandem mass spectrometry by Amaral, Clarice D.B., Amais, Renata S., Fialho, Lucimar L., Schiavo, Daniela, Nogueira, Ana Rita A., Nóbrega, Joaquim A.

“…Inductively coupled plasma mass spectrometer with a triple quadrupole (ICP-MS/MS) was employed to determine carbon from different sources such as plant…”
Get full text

Determination of sulfur in biodiesel microemulsions using the summation of the intensities of multiple emission lines by Young, Carl G., Amais, Renata S., Schiavo, Daniela, Garcia, Edivaldo E., Nóbrega, Joaquim A., Jones, Bradley T.

“…A method for the determination of sulfur in biodiesel samples by inductively coupled plasma optical emission spectrometry which uses microemulsion for sample…”
Get full text

Determination of trace sulfur in biodiesel and diesel standard reference materials by isotope dilution sector field inductively coupled plasma mass spectrometry by Amais, Renata S., Long, Stephen E., Nóbrega, Joaquim A., Christopher, Steven J.

“…•Sulfur mass fractions are measured below 10mgkg−1 in diesel fuel materials.•SF-ICP-MS resolves molecular interferences, including oxygen and sulfur…”
Get full text

ICP-MS and trace element analysis as tools for better understanding medical conditions by Amais, Renata S., Donati, George L., Zezzi Arruda, Marco A.

“…Element constitution and distribution in tissues and body fluids have increasingly become key pieces of information in life sciences and medicine, and trace…”
Get full text

Recent developments in microwave-induced plasma optical emission spectrometry and applications of a commercial Hammer-cavity instrument by Williams, Charles B., Amais, Renata S., Fontoura, Beatriz M., Jones, Bradley T., Nóbrega, Joaquim A., Donati, George L.

“…Microwave-induced plasma optical emission spectrometry (MIP OES) has increasingly become a major resource for multi-elemental analysis. One of the greatest…”
Get full text

Liquid–liquid microextraction in sequential injection analysis for the direct spectrophotometric determination of acid number in biodiesel by Batista, Alex D., Amais, Renata S., Rocha, Fábio R.P.

“…Sequential injection analysis (SIA) is used here for acid number determination in biodiesel exploiting liquid–liquid microextraction and spectrophotometric…”
Get full text

Direct analysis of biodiesel microemulsions using an inductively coupled plasma mass spectrometry by Amais, Renata S., Garcia, Edivaldo E., Monteiro, Marcos R., Nogueira, Ana Rita A., Nóbrega, Joaquim A.

“…An analytical procedure for direct introduction of biodiesel samples into an inductively coupled plasma mass spectrometer (ICP-MS) by using microemulsion for…”
Get full text

Sinais de fundo em análise instrumental: uma discussão essencial em cursos de graduação by Amais, Renata Stábile, Rocha, Fabio R. P., Nobrega, Joaquim A.

“…Understanding instrumental analysis is essential for obtaining reliable analytical results required by chemists in a variety of research areas and industrial…”
Get full text

Interference standard applied to sulfur determination in biodiesel microemulsions by ICP-QMS by Amais, Renata S., Donati, George L., Nóbrega, Joaquim A.

“…Determining sulfur by inductively coupled plasma mass spectrometry (ICP-MS) is not a trivial task especially due to the intense spectral interferences caused…”
Get full text

Strategies to improve accuracy and sensitivity in phosphorus determinations by inductively coupled plasma quadrupole mass spectrometry by Donati, George L., Amais, Renata S., Nóbrega, Joaquim A.

“…The collision/reaction interface with He introduced through the skimmer at 100 mL min-1 is employed to improve accuracy in 31P+ determinations by ICP-QMS. The…”
Get full text

Assessment of nanocomposite alumina supported on multi-wall carbon nanotubes as sorbent for on-line nickel preconcentration in water samples by Amais, Renata S., Ribeiro, Juliana S., Segatelli, Mariana G., Yoshida, Inez V.P., Luccas, Pedro O., Tarley, César R.T.

“…The performance of Al 2O 3/MWCNT nanocomposite as a new sorbent for Ni(II) preconcentration from water samples, using a flow injection system coupled to flame…”
Get full text

Assessment of Polyatomic Interferences Elimination Using a Collision Reaction Interface (CRI) for Inorganic Analysis of Fuel Ethanol by ICP-QMS by Neves, Denise R., Amais, Renata S., Nóbrega, Joaquim A., Neto, José A. Gomes

“…The effectiveness of a collision-reaction interface (CRI) as instrumental device and the addition of oxygen in the composition of auxiliary gas were evaluated…”
Get full text