Development of Pen‐type Portable Electrochemical Sensor Based on Au‐W Bimetallic Nanoparticles Decorated Graphene‐chitosan Nanocomposite Film for the Detection of Nitrite in Water, Milk and Fruit Juices
The development and fabrication of a simple, portable, and sensitive detection tool to precisely monitor nitrite level is of growing importance in electrochemistry research, given the strong interest in the protection of drinking water quality, treatment of wastewater, food production, and control o...
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| Published in | Electroanalysis (New York, N.Y.) Vol. 33; no. 4; pp. 1096 - 1106 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
01.04.2021
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| Subjects | |
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| Abstract | The development and fabrication of a simple, portable, and sensitive detection tool to precisely monitor nitrite level is of growing importance in electrochemistry research, given the strong interest in the protection of drinking water quality, treatment of wastewater, food production, and control of remediation processes. This work describes the fabrication of a simple, cost‐effective, pen‐type electrochemical sensor based on bimetallic gold and tungsten nanoparticles electrochemically decorated on graphene‐chitosan modified pencil graphite electrode (PGE) for the trace detection of nitrite in real samples. The prepared nanocomposite was characterized using XRD, SEM, and EDS. The electrochemical behavior of the sensor was evaluated by cyclic voltammetry (CV) and impedance electrochemical spectroscopy (EIS). Results revealed that the proposed sensor displayed excellent electrocatalytic activity towards electro‐oxidation of nitrite with an irreversible redox reaction. The AuNPs‐WNPs@Gr‐Chi/PGE sensor exhibited excellent analytical performance with a wide linear range from 10 to 250 μM towards nitrite. The LOD and LOQ were calculated to be 0.12 μM and 0.44 μM, respectively. The designed electrochemical sensor was successfully applied for the detection of nitrite in water, milk, and natural fruit juice samples. |
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| AbstractList | The development and fabrication of a simple, portable, and sensitive detection tool to precisely monitor nitrite level is of growing importance in electrochemistry research, given the strong interest in the protection of drinking water quality, treatment of wastewater, food production, and control of remediation processes. This work describes the fabrication of a simple, cost‐effective, pen‐type electrochemical sensor based on bimetallic gold and tungsten nanoparticles electrochemically decorated on graphene‐chitosan modified pencil graphite electrode (PGE) for the trace detection of nitrite in real samples. The prepared nanocomposite was characterized using XRD, SEM, and EDS. The electrochemical behavior of the sensor was evaluated by cyclic voltammetry (CV) and impedance electrochemical spectroscopy (EIS). Results revealed that the proposed sensor displayed excellent electrocatalytic activity towards electro‐oxidation of nitrite with an irreversible redox reaction. The AuNPs‐WNPs@Gr‐Chi/PGE sensor exhibited excellent analytical performance with a wide linear range from 10 to 250 μM towards nitrite. The LOD and LOQ were calculated to be 0.12 μM and 0.44 μM, respectively. The designed electrochemical sensor was successfully applied for the detection of nitrite in water, milk, and natural fruit juice samples. Abstract The development and fabrication of a simple, portable, and sensitive detection tool to precisely monitor nitrite level is of growing importance in electrochemistry research, given the strong interest in the protection of drinking water quality, treatment of wastewater, food production, and control of remediation processes. This work describes the fabrication of a simple, cost‐effective, pen‐type electrochemical sensor based on bimetallic gold and tungsten nanoparticles electrochemically decorated on graphene‐chitosan modified pencil graphite electrode (PGE) for the trace detection of nitrite in real samples. The prepared nanocomposite was characterized using XRD, SEM, and EDS. The electrochemical behavior of the sensor was evaluated by cyclic voltammetry (CV) and impedance electrochemical spectroscopy (EIS). Results revealed that the proposed sensor displayed excellent electrocatalytic activity towards electro‐oxidation of nitrite with an irreversible redox reaction. The AuNPs‐WNPs@Gr‐Chi/PGE sensor exhibited excellent analytical performance with a wide linear range from 10 to 250 μM towards nitrite. The LOD and LOQ were calculated to be 0.12 μM and 0.44 μM, respectively. The designed electrochemical sensor was successfully applied for the detection of nitrite in water, milk, and natural fruit juice samples. |
| Author | Kumari, K. Gowri Bala Prasad, K. R. S. Lavanya, Akkaraboyina Lakshmi Brahman, Pradeep Kumar |
| Author_xml | – sequence: 1 givenname: Akkaraboyina Lakshmi surname: Lavanya fullname: Lavanya, Akkaraboyina Lakshmi organization: Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur – sequence: 2 givenname: K. Gowri Bala surname: Kumari fullname: Kumari, K. Gowri Bala organization: Acharya Nagarjuna University, Nagarjuna Nagar, Andhra – sequence: 3 givenname: K. R. S. surname: Prasad fullname: Prasad, K. R. S. organization: Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur – sequence: 4 givenname: Pradeep Kumar orcidid: 0000-0001-6532-8558 surname: Brahman fullname: Brahman, Pradeep Kumar email: tiwari25_pradeep@yahoo.com, drpkt@kluniversity.in organization: Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur |
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| Title | Development of Pen‐type Portable Electrochemical Sensor Based on Au‐W Bimetallic Nanoparticles Decorated Graphene‐chitosan Nanocomposite Film for the Detection of Nitrite in Water, Milk and Fruit Juices |
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