Simultaneous Voltammetric Determination of Acetaminophen and Caffeine at a Graphite and Polyurethane Screen-Printed Composite Electrode

Saciloto, Thalita R.; Cervini, Priscila; Cavalheiro, Éder Tadeu Gomes

doi:10.5935/0103-5053.20130186

Cited by 12 publications

(12 citation statements)

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“…The modified screen-printed electrodes were prepared following the same method of manufacturing already reported for unmodified electrodes [35]. However, here the proportions of graphite powder, PU, and modified silica were fixed at 60, 35, and 5 % (w/w), respectively.…”

Section: Preparation Of the Modified Screen-printed Composite Electrodesmentioning

confidence: 99%

“…In previous work, we used a graphite-polyurethane composite electrode in a conventional rod format [4][5][6], and we recently proposed a screen-printed device in which graphite-polyurethane was the basis of an ink used to prepare the working and auxiliary electrodes, as well as the electrical contacts of the reference electrode [35][36][37]. Different to the earlier work, in the present study the ink was modified with 2-benzothiazole-2-thiol organofunctionalized SBA-15 silica prior to the curing process.…”

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confidence: 99%

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Simultaneous Voltammetric Determination of Zn(II), Pb(II), Cu(II), and Hg(II) in Ethanol Fuel Using an Organofunctionalized Modified Graphite‐Polyurethane Composite Disposable Screen‐Printed Device

2014

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A disposable screen‐printed device containing working, auxiliary, and reference electrodes is proposed for the simultaneous voltammetric determination of Zn(II), Pb(II), Cu(II), and Hg(II) in ethanol fuel. The working electrode was printed using an ink modified with 2‐benzothiazole‐2‐thiol organofunctionalized SBA‐15 silica, in order to increase sensitivity. The performance of this electrode was compared with that of bare and SBA‐15‐modified electrodes. After optimizing the experimental parameters, the device was applied in determination of the analytes in commercial ethanol fuel samples, using 0.10 mol L−1 KCl/ethanol ratios of 30 : 70 (v/v), with [H+]=10−5 mol L−1. After 5 min of preconcentration at − 1.3 V (vs. pseudo‐Ag/AgCl), four well‐resolved signals were obtained, enabling simultaneous determination of the four analytes using a differential pulse anodic stripping voltammetry (DPASV) procedure. The limits of detection were 0.30, 0.065, 0.030, and 0.046 µmol L−1 for Zn(II), Pb(II), Cu(II), and Hg(II), respectively. The results of these analyses were in agreement with those obtained using graphite furnace atomic absorption spectroscopy (GFAAS) for Pb(II), Cu(II), and Hg(II), and high‐resolution continuum source flame atomic absorption spectrometry (HR‐CS‐FAAS) for Zn2+, at a 95 % confidence level. Analytes originally present in the samples could be detected, and the interference of some cations and anions was evaluated.

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Section: Preparation Of the Modified Screen-printed Composite Electrodesmentioning

confidence: 99%

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confidence: 99%

Simultaneous Voltammetric Determination of Zn(II), Pb(II), Cu(II), and Hg(II) in Ethanol Fuel Using an Organofunctionalized Modified Graphite‐Polyurethane Composite Disposable Screen‐Printed Device

2014

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“…The same sensor has been earlier evaluated with satisfactory results in electroanalytical determination of acetaminophen [22], simultaneous determination of acetaminophen and caffeine [23] and simultaneous determination of Zn(II), Pb(II), Cu(II), and Hg(II) in ethanol fuel using the SPGPU modified with organofunctionalized SBA-15 silica [24].…”

Section: Introductionmentioning

confidence: 99%

Determination of Epinephrine at a Screen-Printed Composite Electrode Based on Graphite and Polyurethane

Iarb¹,

Tr²,

Cervini³

et al. 2017

J Anal Bioanal Tech

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“…The literature showed that several methods were carried out for the analysis of APAP and CAF in their mixture form. APAP and CAF have been determined by spectrophotometric methods [3][4][5][6][7][8][9][10][11][12][13][14], chromatographic methods [15][16][17][18][19][20][21][22][23], voltammetric techniques [24][25][26], Near Infrared (NIR)-chemometric method [27] and Flow-through (FI) ultraviolet plus multioptosensing device technique [28].…”

Section: Introductionmentioning

confidence: 99%

Spectrum subtraction method for simultaneous determination of acetaminophen and caffeine in panadol extra dosage forms

Sebaiy

Mattar

2020

Eur J Chem

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A simple, specific, accurate and precise spectrophotometric method was established for simultaneous determination of acetaminophen and caffeine in pure form and in their pharmaceutical formulation commercially known as Panadol Extra®. Spectrum subtraction has been used in simultaneous determination of both drugs without prior separation. Spectrum subtraction method parameters were validated according to ICH guidelines in which accuracy, precision, repeatability and robustness were found in accepted limits (98-102%). The linearity range was 7.5-45 µg/mL for caffeine and 4-22 µg/mL for acetaminophen with correlation coefficients ≥0.9990 for both drugs. Advantages and disadvantages of spectrum subtraction were discussed and statistical comparison between the proposed method and the reference one was performed.

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Simultaneous Voltammetric Determination of Acetaminophen and Caffeine at a Graphite and Polyurethane Screen-Printed Composite Electrode

Cited by 12 publications

References 1 publication

Simultaneous Voltammetric Determination of Zn(II), Pb(II), Cu(II), and Hg(II) in Ethanol Fuel Using an Organofunctionalized Modified Graphite‐Polyurethane Composite Disposable Screen‐Printed Device

Simultaneous Voltammetric Determination of Zn(II), Pb(II), Cu(II), and Hg(II) in Ethanol Fuel Using an Organofunctionalized Modified Graphite‐Polyurethane Composite Disposable Screen‐Printed Device

Determination of Epinephrine at a Screen-Printed Composite Electrode Based on Graphite and Polyurethane

Spectrum subtraction method for simultaneous determination of acetaminophen and caffeine in panadol extra dosage forms

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