Employment of Ruthenium as Permanent Modifier for the Determination of Copper in Serum Samples by Electrothermal Atomic Absorption Spectrometry

Pinto, Francisco de Assis de Carvalho; Andrada, Daniel; Rey, Ulisses Vilela; Ansaloni, L. M. S.; Silva, José Bento Borba da

doi:10.1080/00032710600822890

Cited by 11 publications

(1 citation statement)

References 24 publications

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“…Several analytical techniques have been reported for copper determination [5,6,7,8,9,10,11,12,13,14,15,16,17,18]. Among these, Cu 2+ -selective electrodes integrated in potentiometric systems, especially the solid contact ion-selective electrodes (SC-ISEs), draw a lot of attraction owing to their portability, disposability and low-cost [19,20,21,22].…”

Section: Introductionmentioning

confidence: 99%

Single-Piece Solid Contact Cu2+-Selective Electrodes Based on a Synthesized Macrocyclic Calix[4]arene Derivative as a Neutral Carrier Ionophore

et al. 2019

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Herein, a facile route leading to good single-walled carbon nanotubes (SWCNT) dispersion or poly (3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) based single-piece nanocomposite membrane is proposed for trace determination of Cu2+ ions. The single-piece solid contact Cu2+-selective electrodes were prepared after drop casting the membrane mixture on the glassy-carbon substrates. The prepared potentiometric sensors revealed a Nernstian response slope of 27.8 ± 0.3 and 28.1 ± 0.4 mV/decade over the linearity range 1.0 × 10−3 to 2.0 × 10−9 and 1.0 × 10−3 to 1.0 × 10−9 M with detection limits of 5.4 × 10−10 and 5.0 × 10−10 M for sensors based on SWCNTs and PEDOT/PSS, respectively. Excellent long-term potential stability and high hydrophobicity of the nanocomposite membrane are recorded for the prepared sensors due to the inherent high capacitance of SWCNT used as a solid contact material. The sensors exhibited high selectivity for Cu2+ ions at pH 4.5 over other common ions. The sensors were applied for Cu2+ assessment in tap water and different tea samples. The proposed sensors were robust, reliable and considered as appealing sensors for copper (II) detection in different complex matrices.

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Section: Introductionmentioning

confidence: 99%

Single-Piece Solid Contact Cu2+-Selective Electrodes Based on a Synthesized Macrocyclic Calix[4]arene Derivative as a Neutral Carrier Ionophore

et al. 2019

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Indirect Determination of Trace Copper(II) by Adsorptive Stripping Voltammetry with Zincon at a Carbon Paste Electrode

Taher¹,

Esfandyarpour²,

Abbasi³

et al. 2008

Electroanalysis

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Traces of copper(II) can be determined by adsorptive stripping voltammetry using 2-carboxy-2'-hydroxy-5'-sulfoformazyl benzene (Zincon) as complex forming reagent. First in phosphate buffer pH 6.4, copper(II)-Zincon complex was adsorbed on carbon paste electrode (CPE) with an accumulation potential of 0.6 V. Following this, adsorbed complex was oxidized and detected by differential pulse voltammetric (DPV) scan from 0.6 to 1.0 V. The effective parameters in sensor response were examined. The detection limit (DL) of copper(II) was 1.1 mg/L and relative standard deviations (RSDs) for 10 and 200 mg/L Cu(II) were 1.81 and 1.03%, respectively. The calibration curve was linear for 2 -220 mg/L copper(II). The resulting CPE does not use mercury and therefore, has a positive environmental benefit. The method, which is reasonably sensitive and selective, has been successfully applied to the determination of trace amount of copper in water and human hair samples.

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Direct Method for Determination of Al, Cd, Cu, and Pb in Beers In Situ Digested by GF AAS Using Permanent Modifiers

Borges

Beinner

Silva

2015

Biol Trace Elem Res

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The object of the present study was to development of safe, reliable fast, and efficient methodologies for the direct determination of Al, Pb, Cu, and Cd in non-digested beer samples of widely consumed brand name beers sold in Brazil, using graphite furnace absorption spectrometry (GF AAS). Pyrolysis and atomization temperature curves of selected chemical modifiers (iridium, rhodium, ruthenium, zirconium, and non-modifier use) were used to stabilize each metal and sensitivity in a beer sample was diluted to 1:1 with 0.2 % v/v nitric acid after degasification. The best modifier for aluminum was permanent zirconium, with a characteristic mass of 4.2 pg (recommended is 10 pg), demonstrating a symmetrical peak with a corrected background using a deuterium arc lamp. For cadmium and copper, the best modifier was permanent ruthenium with characteristic masses of 0.3 and 7 pg (recommended are 0.35 and 4 pg, respectively, for Cd and Cu), respectively. The best condition for lead was using a non-modifier, with a characteristic mass of 6.9 pg (recommended is 10 pg). The limits of detection and mean recoveries, done over three consecutive days for aluminum, copper, lead, and cadmium, were 1.9, 2.9, 0.8, and 0.6 pg and 105, 104, 101, and 102 %, respectively. From the observed results, we may conclude that some metals, such as Al, Cd, Cu, and Pb, can be determined easily with graphite furnace atomic absorption spectrometry without sample digestion using a dilute nitric acid solution.

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Employment of Ruthenium as Permanent Modifier for the Determination of Copper in Serum Samples by Electrothermal Atomic Absorption Spectrometry

Cited by 11 publications

References 24 publications

Single-Piece Solid Contact Cu2+-Selective Electrodes Based on a Synthesized Macrocyclic Calix[4]arene Derivative as a Neutral Carrier Ionophore

Single-Piece Solid Contact Cu2+-Selective Electrodes Based on a Synthesized Macrocyclic Calix[4]arene Derivative as a Neutral Carrier Ionophore

Indirect Determination of Trace Copper(II) by Adsorptive Stripping Voltammetry with Zincon at a Carbon Paste Electrode

Direct Method for Determination of Al, Cd, Cu, and Pb in Beers In Situ Digested by GF AAS Using Permanent Modifiers

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