Flow manifold for chemical H-point standard addition method implemented to electrochemical analysis based on the capacitance measurements

Wieczorek, Marcin; Madej, Maria; Starzec, Karolina; Knihnicki, Paweł; Telk, Anna; Kochana, Jolanta; Kościelniak, Paweł

doi:10.1016/j.talanta.2018.03.098

Cited by 10 publications

(3 citation statements)

References 18 publications

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“…This method enables to increase the accuracy of the analysis by extrapolating the calibration plot to the signal measured for standard solution (added to the measurement vessel before sample), and not to the background signal, as in the case of the conventional standard addition method. The principles of SISAM calibration method were described in detail in this work [ 30 ]. On the basis of the obtained results using SISAM method, the recovery and RSD values were determined (Table 2 ).…”

Section: Resultsmentioning

confidence: 99%

Electrochemical sensing platform based on screen-printed carbon electrode modified with plasma polymerized acrylonitrile nanofilms for determination of bupropion

Madej,

Trzcińska,

Lipińska

et al. 2023

Microchim Acta

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A original electrochemical sensing platform, based on screen-printed electrodes modification with plasma polymerized acrylonitrile (pp-AN) nanofilms is proposed. For that purpose, plasma-enhanced chemical vapor deposition (PECVD) process was conducted in a parallel plate (13.56 MHz) plasma reactor for 2 min with discharge power of 10 W. The surface topography and electrochemical properties of prepared sensors were investigated by X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersion spectroscopy, electrochemical impedance spectroscopy, and cyclic voltammetry. The electrochemical characteristics of pp-AN/SPCE and pp-AN/SPAuE sensors was investigated for model redox pair [Fe(CN)6]4−/3−. Conducted research confirmed the excellent chemical stability, durability, wide potential window, high signal-to-noise (S/N) ratio, and, most importantly, the ability to standardize the sensors. The pp-AN/SPCE sensor was applied to the determination of bupropion, an antidepressant drug whose intake has increased dramatically during the COVID-19 pandemic. The voltammetric response of pp-AN/SPCE for BUP was linear in two concentration ranges of 0.63–10.0 and 10.0–50.0 μmol L−1, with a detection limit of 0.21 μmol L−1. Satisfactory recoveries (96.2–102%) and good precision (RSD below 4.1%) obtained for environmental and biological samples confirmed the usefulness of the sensor for the analysis of various kinds of samples. Graphical Abstract

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Section: Resultsmentioning

confidence: 99%

Electrochemical sensing platform based on screen-printed carbon electrode modified with plasma polymerized acrylonitrile nanofilms for determination of bupropion

Madej,

Trzcińska,

Lipińska

et al. 2023

Microchim Acta

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“…Real sample analysis.-To investigate the performance of the C 3 F 7 -azo + -TaWO 6 /GCE in real samples, the developed electrode was used to the simultaneous determination of AA and DA in human urine sample with a standard addition method. 51 The urine sample was collected by centrifugation and 1 ml of the supernatant was diluted 100 times with PBS of pH = 6, and then different concentrations of AA and DA was added in the urine sample. First, the concentrations of AA and DA in real sample were tested when we have not added a standard, and then the accuracy and antiinterference of C 3 F 7 -azo + -TaWO 6 /GCE is determined by gradually adding AA and DA to the real sample and calculating the recovery and deviation.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Polyfluorinated Azobenzene Intercalated Tantalum Tungstate Nanocomposite for Determination of Dopamine and Ascorbic Acid

Wang

Cao

et al. 2021

J. Electrochem. Soc.

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A sandwich-structured C3F7-azo+-TaWO6 nanocomposite used as an electrochemical sensor for simultaneous determination of dopamine (DA) and ascorbic acid (AA) was synthesized by guest-guest exchange method. n-PrNH3 +-TaWO6 precursor was ion-exchanged with cationic polyfluorinated azo dye, trans-[2-(2,2,3,3,4,4,4-heptafluorobutylamino)ethyl]-{2-[4-(4-hexyphenylazo)-phenoxy]ethyl} dimethylammonium bromide (abbreviated as C3F7-azo+Br−). The structure and morphology were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive spectrometer analysis (EDS) and Fourier transform infrared spectrometer (FTIR). Differential pulse voltammetry (DPV) and cyclic voltammetry (CV) were used to test the electrochemical properties of C3F7-azo+-TaWO6 nanocomposite. The experimental results show that C3F7-azo+-TaWO6/GCE can detect AA and DA at the same time, with the potential difference reaching 356 mV. Moreover, electrochemical sensing toward DA and AA on C3F7-azo+-TaWO6/ GCE exhibits low detection limits of 0.81 μM and 1.6 μM, respectively, each in a linear range of 0.05 to 0.31 mM.

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“…An elevated level of potassium in the blood can lead to serious diseases such as kidney failure, heart attack, or diabetes. The need for controlling the potassium concentration in water and other Materials 2022, 15, 579 2 of 12 sources is undoubtedly valuable not only from the diagnostic point of view, but also from the point of view of water quality assurance [4,5].…”

Section: Introductionmentioning

confidence: 99%

The Use of an Acylhydrazone-Based Metal-Organic Framework in Solid-Contact Potassium-Selective Electrode for Water Analysis

et al. 2022

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A solid-contact ion-selective electrode was developed for detecting potassium in environmental water. Two versions of a stable cadmium acylhydrazone-based metal organic framework, i.e., JUK-13 and JUK-13_H2O, were used for the construction of the mediation layer. The potentiometric and electrochemical characterizations of the proposed electrodes were carried out. The implementation of the JUK-13_H2O interlayer is shown to improve the potentiometric response and stability of measured potential. The electrode exhibits a good Nernstian slope (56.30 mV/decade) in the concentration range from 10−5 to 10−1 mol L−1 with a detection limit of 2.1 µmol L−1. The long-term potential stability shows a small drift of 0.32 mV h−1 over 67 h. The electrode displays a good selectivity comparable to ion-selective electrodes with the same membrane. The K-JUK-13_H2O-ISE was successfully applied for the determination of potassium in three certified reference materials of environmental water with great precision (RSD < 3.00%) and accuracy (RE < 3.00%).

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Flow manifold for chemical H-point standard addition method implemented to electrochemical analysis based on the capacitance measurements

Cited by 10 publications

References 18 publications

Electrochemical sensing platform based on screen-printed carbon electrode modified with plasma polymerized acrylonitrile nanofilms for determination of bupropion

Electrochemical sensing platform based on screen-printed carbon electrode modified with plasma polymerized acrylonitrile nanofilms for determination of bupropion

Synthesis of Polyfluorinated Azobenzene Intercalated Tantalum Tungstate Nanocomposite for Determination of Dopamine and Ascorbic Acid

The Use of an Acylhydrazone-Based Metal-Organic Framework in Solid-Contact Potassium-Selective Electrode for Water Analysis

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