scholarly journals Potentiometric Sensor Based on Carbon Paste Electrode for Monitoring Total Residual Chlorine in Electrolytically-Treated Ballast Water

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 350
Author(s):  
Yaning Zhang ◽  
Zhihui Li ◽  
Xiaotong Guo ◽  
Guangzhou Liu ◽  
Shuyong Zhang
Keyword(s):  
Carbon Paste Electrode ◽  
Ballast Water ◽  
Continuous Monitoring ◽  
Open Circuit ◽  
Potentiometric Sensor ◽  
Modified Carbon Paste Electrode ◽  
Residual Chlorine ◽  
Carbon Paste ◽  
Paraffin Oil ◽  
Paste Electrode

A new potentiometric sensor based on modified carbon paste electrode (CPE) was prepared for the sensitive and selective detection of total residual chlorine (TRC) in simulated electrolytically-treated ballast water (BW). The modified CPE was prepared using ferrocene (Fc) as the sensing species and paraffin oil as the binder. It is revealed that the addition of Fc can significantly shorten the response time and improve the reproducibility, selectivity, and stability of the sensor. The open circuit potential of the Fc-CPE is in linear proportion to the logarithm of TRC within the TRC concentration range from 1 mg∙dm−3 to 15 mg∙dm−3. In addition, the Fc-CPE sensor exhibits good selectivity to TRC over a wide concentration range of the possible co-exiting interference ions in seawater. The Fc-CPE electrode can be used as a convenient and reliable sensor for the continuous monitoring of TRC during the electrolytic treatment of BW.

scholarly journals Square wave anodic stripping voltammetric determination of Hg(II) with N-p- chlorophenylcinnamohydroxamic acid modified carbon paste electrode

2020 ◽  
Vol 34 (1) ◽  
pp. 25-39
Author(s):  
Denekew Alemayehu ◽  
Bhagwan Singh Chandravanshi Chandravanshi ◽  
Tesfu Hailu ◽  
Merid Tessema
Keyword(s):  
Carbon Paste Electrode ◽  
Anodic Stripping Voltammetry ◽  
Open Circuit ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Square Wave ◽  
Relative Standard ◽  
Anodic Stripping ◽  
Paste Electrode

A new method has been developed for the electrochemical determination of Hg(II) with N-p-chlorophenylcinnamohydroxamic acid (CPCHA) modified carbon paste electrode by square wave anodic stripping voltammetry (SWASV). Hg(II) was accumulated on the electrode surface by the formation of the complex in an open circuit and the resulting surface was characterized by electrochemical reduction and stripping. The optimum voltammetric response was observed using a carbon paste composition of 7.5% (w/w) CPCHA and preconcentration time of 210 s in 0.1 M sodium acetate at pH 8 followed by electrochemical SWASV in 0.3 M NH4Cl solution at pH 4 at a reduction potential of -0.6 V. The voltammetric signals were linear in the range of 1-25 µM Hg(II) with a detection limit of 12.9 nM. The voltammetric response for six replicate measurements of 15 µM Hg(II) was reproduced with 3.8% relative standard deviation (RSD). Many coexisting metal ions had little or no effect on the determination of Hg(II). Five spiked samples of water were evaluated by using the developed method giving recoveries of Hg(II) in the range 98-105%.   Bull. Chem. Soc. Ethiop. 2020, 34(1), 25-39. DOI: https://dx.doi.org/10.4314/bcse.v34i1.3

Imprinted zeolite modified carbon paste electrode as a selective potentiometric sensor for blood glucose

2020 ◽  
Author(s):  
Miratul Khasanah ◽  
Alfa Akustia Widati ◽  
Usreg Sri Handajani ◽  
Masfah Raudlotus Shofiyyah ◽  
Sabrina Aulia Rakhma ◽  
...  
Keyword(s):  
Blood Glucose ◽  
Carbon Paste Electrode ◽  
Potentiometric Sensor ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Paste Electrode

scholarly journals Electro-Polymerized Titan Yellow Modified Carbon Paste Electrode for the Analysis of Curcumin

Surfaces ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 191-204
Author(s):  
Edwin S. D’Souza ◽  
Jamballi G. Manjunatha ◽  
Chenthattil Raril ◽  
Girish Tigari ◽  
Huligerepura J. Arpitha ◽  
...  
Keyword(s):  
Carbon Paste Electrode ◽  
Limit Of Detection ◽  
Phosphate Buffer Solution ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Buffer Solution ◽  
Solution Ph ◽  
Real Sample Analysis ◽  
Titan Yellow ◽  
Paste Electrode

A modest, efficient, and sensitive chemically modified electrode was fabricated for sensing curcumin (CRC) through an electrochemically polymerized titan yellow (TY) modified carbon paste electrode (PTYMCPE) in phosphate buffer solution (pH 7.0). Cyclic voltammetry (CV) linear sweep voltammetry (LSV) and differential pulse voltammetry (DPV) approaches were used for CRC detection. PTYMCPE interaction with CRC suggests that the electrode exhibits admirable electrochemical response as compared to bare carbon paste electrode (BCPE). Under the optimized circumstances, a linear response of the electrode was observed for CRC in the concentration range 2 × 10−6 M to 10 × 10−6 M with a limit of detection (LOD) of 10.94 × 10−7 M. Moreover, the effort explains that the PTYMCPE electrode has a hopeful approach for the electrochemical resolution of biologically significant compounds. Additionally, the proposed electrode has demonstrated many advantages such as easy preparation, elevated sensitivity, stability, and enhanced catalytic activity, and can be successfully applied in real sample analysis.

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