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Research paper thumbnail of Electroanalytical determination of carbendazim by square wave adsorptive stripping voltammetry with a multiwalled carbon nanotubes modified electrode

A preconcentrating/voltammetric multiwalled carbon nanotube modified glassy carbon electrode (MWC... more A preconcentrating/voltammetric multiwalled carbon nanotube modified glassy carbon electrode (MWCNT–GCE) has been developed for stripping analysis of carbendazim (Methyl Benzimidazol-2-yl Carbamate—MBC), based on dispersing MWCNT in water. The effect of experimental variables, such as the dispersion and loading of MWCNT, was assessed. A quasi-reversible behavior for MBC in acetic acid/acetate buffer 0.1 mol L À1 (pH 4.7) was verified and its high effective pre-concentration was attributed to the high adsorption capability and enormous surface area of the MWCNT. No evidence of carry-over effect, combined with the easiness of electrode preparation, led to the development of a highly sensitive and reliable method with an experimental work range from 0.256 to 3.11 mmol L À1 with a detection limit of 10.5 ppb for a short (60 s) accumulation period. Measurement of MBC in a river water sample was demonstrated. The accuracy of the method for real sample analysis was assessed by estimating the apparent recovery (93 AE 2.9% and 86 AE 4.1% for 4.3 Â 10 À7 mol L À1) for a MBC spiked river water sample.

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Research paper thumbnail of Análise em fluxo e análise in situ como estratégias de melhoramento da sequência analítica de amostras agronômicas

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Research paper thumbnail of Introducing factorial design concepts using experiments with multi-colored chocolates

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Research paper thumbnail of Ethanol fuel adulteration with methanol assessed by cyclic voltammetry and multivariate calibration

Fuel, 2015

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Research paper thumbnail of An electroanalytical method to detect adulteration of ethanol fuel by using multivariate analysis

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Research paper thumbnail of DC conductivity study of polyaniline and poly(acrylonitrile-butadiene-styrene) blends

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Research paper thumbnail of Decomposição de amostras de solos assistida por radiação microondas: estratégia para evitar a formação de fluoretos insolúveis

Revista Brasileira de Ciência do Solo, 2005

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Research paper thumbnail of A method for Ca, Fe, Ga, Na, Si and Zn determination in alumina by inductively coupled plasma optical emission spectrometry after aluminum precipitation

Spectrochimica Acta Part B-Atomic Spectroscopy, 2011

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Research paper thumbnail of Simultaneous determination of Cu, Pb, Cd, Ni, Co and Zn in bioethanol fuel by adsorptive stripping voltammetry and multivariate linear regression

Fuel, 2014

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Research paper thumbnail of DC conductivity study of polyaniline and poly(acrylonitrile-butadiene-styrene) blends

Synthetic Metals, 2009

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Research paper thumbnail of Development of a screen-printed thick-film nitrate sensor based on a graphite-epoxy composite for agricultural applications

Sensors and Actuators B: Chemical, 2003

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Research paper thumbnail of Multivariate optimization of the voltammetric determination of Cd, Cu, Pb and Zn at bismuth film. Application to analysis of biodiesel

Microchemical Journal, 2013

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Research paper thumbnail of Simultaneous determination of acesulfame-K and aspartame using linear sweep voltammetry and multivariate calibration

Microchemical Journal, 2013

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Research paper thumbnail of Electrocatalysis of methanol, ethanol and formic acid using a Ru/Pt metallic bilayer

Journal of Power Sources, 2007

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Research paper thumbnail of Nickel sorption capacity of ground xylem of Quercus ilex trees and effects of selected ligands present in the xylem sap

Journal of Plant Physiology, 2009

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Research paper thumbnail of Systematic evaluation of the preparation of conducting PANI/ABS blends

Journal of Applied Polymer Science, 2000

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Research paper thumbnail of Exploring the emission intensities of ICP OES aided by chemometrics in the geographical discrimination of mineral waters

Journal of Analytical Atomic Spectrometry, 2011

J. Anal. At. Spectrom., 2011, Advance Article DOI:10.1039/C0JA00071J (Paper). Exploring the emiss... more J. Anal. At. Spectrom., 2011, Advance Article DOI:10.1039/C0JA00071J (Paper). Exploring the emission intensities of ICP OES aided by chemometrics in the geographical discrimination of mineral waters. Alexandre Luiz Souza ...

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Research paper thumbnail of In-Soil Potassium Sensor System

Journal of Agricultural and Food Chemistry, 2004

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Research paper thumbnail of Flow Injection Potentiometric System for the Simultaneous Determination of Inositol Phosphates and Phosphate:  Phosphorus Nutritional Evaluation on Seeds and Grains

Journal of Agricultural and Food Chemistry, 2005

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Research paper thumbnail of Soil Calcium and pH Monitoring Sensor System

Journal of Agricultural and Food Chemistry, 2007

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Research paper thumbnail of Electroanalytical determination of carbendazim by square wave adsorptive stripping voltammetry with a multiwalled carbon nanotubes modified electrode

A preconcentrating/voltammetric multiwalled carbon nanotube modified glassy carbon electrode (MWC... more A preconcentrating/voltammetric multiwalled carbon nanotube modified glassy carbon electrode (MWCNT–GCE) has been developed for stripping analysis of carbendazim (Methyl Benzimidazol-2-yl Carbamate—MBC), based on dispersing MWCNT in water. The effect of experimental variables, such as the dispersion and loading of MWCNT, was assessed. A quasi-reversible behavior for MBC in acetic acid/acetate buffer 0.1 mol L À1 (pH 4.7) was verified and its high effective pre-concentration was attributed to the high adsorption capability and enormous surface area of the MWCNT. No evidence of carry-over effect, combined with the easiness of electrode preparation, led to the development of a highly sensitive and reliable method with an experimental work range from 0.256 to 3.11 mmol L À1 with a detection limit of 10.5 ppb for a short (60 s) accumulation period. Measurement of MBC in a river water sample was demonstrated. The accuracy of the method for real sample analysis was assessed by estimating the apparent recovery (93 AE 2.9% and 86 AE 4.1% for 4.3 Â 10 À7 mol L À1) for a MBC spiked river water sample.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Análise em fluxo e análise in situ como estratégias de melhoramento da sequência analítica de amostras agronômicas

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Introducing factorial design concepts using experiments with multi-colored chocolates

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Ethanol fuel adulteration with methanol assessed by cyclic voltammetry and multivariate calibration

Fuel, 2015

Bookmarks Related papers MentionsView impact

Research paper thumbnail of An electroanalytical method to detect adulteration of ethanol fuel by using multivariate analysis

Bookmarks Related papers MentionsView impact

Research paper thumbnail of DC conductivity study of polyaniline and poly(acrylonitrile-butadiene-styrene) blends

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Decomposição de amostras de solos assistida por radiação microondas: estratégia para evitar a formação de fluoretos insolúveis

Revista Brasileira de Ciência do Solo, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A method for Ca, Fe, Ga, Na, Si and Zn determination in alumina by inductively coupled plasma optical emission spectrometry after aluminum precipitation

Spectrochimica Acta Part B-Atomic Spectroscopy, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Simultaneous determination of Cu, Pb, Cd, Ni, Co and Zn in bioethanol fuel by adsorptive stripping voltammetry and multivariate linear regression

Fuel, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of DC conductivity study of polyaniline and poly(acrylonitrile-butadiene-styrene) blends

Synthetic Metals, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Development of a screen-printed thick-film nitrate sensor based on a graphite-epoxy composite for agricultural applications

Sensors and Actuators B: Chemical, 2003

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Multivariate optimization of the voltammetric determination of Cd, Cu, Pb and Zn at bismuth film. Application to analysis of biodiesel

Microchemical Journal, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Simultaneous determination of acesulfame-K and aspartame using linear sweep voltammetry and multivariate calibration

Microchemical Journal, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Electrocatalysis of methanol, ethanol and formic acid using a Ru/Pt metallic bilayer

Journal of Power Sources, 2007

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Nickel sorption capacity of ground xylem of Quercus ilex trees and effects of selected ligands present in the xylem sap

Journal of Plant Physiology, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Systematic evaluation of the preparation of conducting PANI/ABS blends

Journal of Applied Polymer Science, 2000

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Exploring the emission intensities of ICP OES aided by chemometrics in the geographical discrimination of mineral waters

Journal of Analytical Atomic Spectrometry, 2011

J. Anal. At. Spectrom., 2011, Advance Article DOI:10.1039/C0JA00071J (Paper). Exploring the emiss... more J. Anal. At. Spectrom., 2011, Advance Article DOI:10.1039/C0JA00071J (Paper). Exploring the emission intensities of ICP OES aided by chemometrics in the geographical discrimination of mineral waters. Alexandre Luiz Souza ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of In-Soil Potassium Sensor System

Journal of Agricultural and Food Chemistry, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Flow Injection Potentiometric System for the Simultaneous Determination of Inositol Phosphates and Phosphate:  Phosphorus Nutritional Evaluation on Seeds and Grains

Journal of Agricultural and Food Chemistry, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Soil Calcium and pH Monitoring Sensor System

Journal of Agricultural and Food Chemistry, 2007

Bookmarks Related papers MentionsView impact

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