scholarly journals Electrochemical Detection of Arsenite Using a Silica Nanoparticles-Modified Screen-Printed Carbon Electrode

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3168
Author(s):  
Suhainie Ismail ◽  
Nor Azah Yusof ◽  
Jaafar Abdullah ◽  
Siti Fatimah Abd Rahman
Keyword(s):  
Electron Microscopy ◽  
Silica Nanoparticles ◽  
Low Cost ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Carbon Electrode ◽  
Suggested Approach ◽  
Screen Printed Carbon Electrode ◽  
Modified Sensor ◽  
Screen Printed

Arsenic poisoning in the environment can cause severe effects on human health, hence detection is crucial. An electrochemical-based portable assessment of arsenic contamination is the ability to identify arsenite (As(III)). To achieve this, a low-cost electroanalytical assay for the detection of As(III) utilizing a silica nanoparticles (SiNPs)-modified screen-printed carbon electrode (SPCE) was developed. The morphological and elemental analysis of functionalized SiNPs and a SiNPs/SPCE-modified sensor was studied using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR). The electrochemical responses towards arsenic detection were measured using the cyclic voltammetry (CV) and linear sweep anodic stripping voltammetry (LSASV) techniques. Under optimized conditions, the anodic peak current was proportional to the As(III) concentration over a wide linear range of 5 to 30 µg/L, with a detection limit of 6.2 µg/L. The suggested approach was effectively valid for the testing of As(III) found within the real water samples with good reproducibility and stability.

Determination of Copper(II) Through Anodic Stripping Voltammetry in Tartrate Buffer Using an Antimony Film Screen-printed Carbon Electrode

2017 ◽  
Vol 50 (18) ◽  
pp. 2920-2936 ◽  
Author(s):  
Andrzej Bobrowski ◽  
Mariola Maczuga ◽  
Agnieszka Królicka ◽  
Evangelia Konstanteli ◽  
Chrysavgi Sakellaropoulou ◽  
...  
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Carbon Electrode ◽  
Screen Printed Carbon Electrode ◽  
Anodic Stripping ◽  
Antimony Film ◽  
Determination Of Copper ◽  
Screen Printed

Low Cost CuO Nanorod Growth on Screen-printed Carbon Electrode for Pesticide Analysis

2020 ◽  
Author(s):  
Nattida Rongwaree ◽  
Tongchatra Watcharawittayakul ◽  
Cholthisa Sooksamphanwong ◽  
Phichamon Sakdarat ◽  
Chanchana Thanachayanont ◽  
...  
Keyword(s):  
Low Cost ◽  
Carbon Electrode ◽  
Pesticide Analysis ◽  
Screen Printed Carbon Electrode ◽  
Nanorod Growth ◽  
Screen Printed

scholarly journals Application of screen-printed carbon electrode modified with lead in stripping analysis of Cd(II)

2017 ◽  
Vol 15 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Katarzyna Tyszczuk-Rotko ◽  
Katarzyna Domańska ◽  
Karel Vytřas ◽  
Radovan Metelka ◽  
Agnieszka Nosal-Wiercińska ◽  
...  
Keyword(s):  
Film Growth ◽  
Film Formation ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Carbon Support ◽  
Screen Printed Carbon Electrode ◽  
Voltammetric Studies ◽  
Lead Film ◽  
Screen Printed

AbstractIn the work presented, a lead film electrode was prepared in situ on a screen-printed carbon support using a reversibly deposited mediator (Zn) and applied to the determination of Cd(II) by anodic stripping voltammetry. The electrochemical method for lead film formation is based on a co-deposition of a metal of interest (Pb), with a reversibly deposited zinc mediator, followed by oxidation of zinc, with additional deposition of lead at the appropriate potential. It serves to increase the density of lead particles, promoting lead film growth, and consequently helps to improve the electrochemical properties of the electrode. This was confirmed by microscopic and voltammetric studies. The obtained detection limit of Cd(II) is equal to 6.6 × 10−9 mol L−1 (−1.6 V for 180 s and then −0.95 V for 5 s). The presented procedure was successfully applied to cadmium determination in Bystrzyca River water samples.

scholarly journals Preanodized Screen Printed Carbon Electrode for Detection of Linalool using Three Terminal Network

2019 ◽  
Vol 9 (2) ◽  
pp. 477-482
Keyword(s):  
Electrochemical Sensors ◽  
Low Cost ◽  
Moving Average ◽  
Chemical Compounds ◽  
Carbon Electrode ◽  
Impedance Plot ◽  
Analytical Instruments ◽  
Screen Printed Carbon Electrode ◽  
The Stability ◽  
Screen Printed

Linalool is a very important flavouring compound found in plants which is used in food and beverages. Linalool has been traditionally detected by analytical instruments such as gas chromatography (GC) coupled with mass spectroscopy(MS) which are not suitable for routine tests. For fast and low cost detection of chemical compounds electrochemial sensors are most suitable. Screen printed carbon electrode (SPCE) is one of the most popular and low cost device used for detection of chemical compounds. In this article we present the detection of linalool using a low cost preannodized commercial screen printed carbon electrode (SPCE). Traditionally electrochemical sensors are used in two terminal mode, however three terminal analysis of electrochemical sensors are found to be more rationale and accurate. In this paper we have analyzed detection of linalool by an advanced three terminal analysis. First we have performed cyclic voltammetry(CV) of the SPCE which showed clear oxidation peaks at different concentration of linalool. The input-output data of the CV has been used for analysis of the impedance of the SPCE.The impedance model of the SPCE was estimated by autoregressive moving average with exogenous inputs(ARMAX) modelling technique using the CV data. The three terminal impedance fitting revealed the values of electrical parameters and the parasitic elements at different linalool concentration. The stability limits of the SPCE was also determined from the pole-zero and Nyquist plots of the estimated models. Impedance behaviour to frequency of the SPCE was further analyzed by impedance plot( 𝒁 vs −𝒁 ′ ) from which we are able to relate the CV scan rate to the impedance of the SPCE. Finally the sensitivity and repeatability of the SPCE was determined using a measurement circuit.

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