Amperometry detection of nitrite in food samples using tetrasulfonated copper phthalocyanine modified glassy carbon electrode

A. Sudarvizhi; K. Pandian; Oluwatobi Samuel Oluwafemi; Subash C.B. Gopinath

doi:10.1016/j.snb.2018.05.147

Amperometry detection of nitrite in food samples using tetrasulfonated copper phthalocyanine modified glassy carbon electrode

A. Sudarvizhi, K. Pandian, Oluwatobi Samuel Oluwafemi, Subash C.B. Gopinath

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

A stable chitosan protected tetrasulfonated copper phthalocyanine (Chit-TsCuPc) modified glassy carbon electrode (GCE) was used to aid the electrochemical detection of nitrite (NO₂⁻) in food samples. The electrochemical oxidation of NO₂⁻ was investigated on bare, chitosan and TsCuPc modified GCE in presence of phosphate buffer solution with an acidic medium. The elevated oxidation peak current was noticed at less oxidation potential for + 0.55 V vs. Ag/AgCl at Chit-TsCuPc modified electrode under the optimized experimental conditions. The plot displays the peak current against NO₂⁻ with a good linearity in the concentration rangefrom 6.5 × 10⁻⁸ M to 5.0 × 10⁻¹⁰M. The linear regression equation is calculated to be I_p (μA) = 0.5291 + 1.4894C (NO₂⁻), has a good correlation coefficient of 0.9949 and the detection limit of 22 nM (S/N = 3) with the current sensitivity of 4.964 μA nM⁻¹ cm⁻². The standard addition method was adopted to measure the unknown NO₂⁻ concentration in food samples.

Original language	English
Pages (from-to)	151-159
Number of pages	9
Journal	Sensors and Actuators B: Chemical
Volume	272
DOIs	https://doi.org/10.1016/j.snb.2018.05.147
Publication status	Published - 1 Nov 2018

Keywords

Amperometric detection
Chitosan
Food sample
Limit of detection
Nitrite

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/j.snb.2018.05.147

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title = "Amperometry detection of nitrite in food samples using tetrasulfonated copper phthalocyanine modified glassy carbon electrode",

abstract = "A stable chitosan protected tetrasulfonated copper phthalocyanine (Chit-TsCuPc) modified glassy carbon electrode (GCE) was used to aid the electrochemical detection of nitrite (NO2−) in food samples. The electrochemical oxidation of NO2− was investigated on bare, chitosan and TsCuPc modified GCE in presence of phosphate buffer solution with an acidic medium. The elevated oxidation peak current was noticed at less oxidation potential for + 0.55 V vs. Ag/AgCl at Chit-TsCuPc modified electrode under the optimized experimental conditions. The plot displays the peak current against NO2− with a good linearity in the concentration rangefrom 6.5 × 10−8 M to 5.0 × 10−10M. The linear regression equation is calculated to be Ip (μA) = 0.5291 + 1.4894C (NO2−), has a good correlation coefficient of 0.9949 and the detection limit of 22 nM (S/N = 3) with the current sensitivity of 4.964 μA nM−1 cm−2. The standard addition method was adopted to measure the unknown NO2− concentration in food samples.",

keywords = "Amperometric detection, Chitosan, Food sample, Limit of detection, Nitrite",

author = "A. Sudarvizhi and K. Pandian and Oluwafemi, {Oluwatobi Samuel} and Gopinath, {Subash C.B.}",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = nov,

day = "1",

doi = "10.1016/j.snb.2018.05.147",

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T1 - Amperometry detection of nitrite in food samples using tetrasulfonated copper phthalocyanine modified glassy carbon electrode

AU - Sudarvizhi, A.

AU - Pandian, K.

AU - Oluwafemi, Oluwatobi Samuel

AU - Gopinath, Subash C.B.

PY - 2018/11/1

Y1 - 2018/11/1

N2 - A stable chitosan protected tetrasulfonated copper phthalocyanine (Chit-TsCuPc) modified glassy carbon electrode (GCE) was used to aid the electrochemical detection of nitrite (NO2−) in food samples. The electrochemical oxidation of NO2− was investigated on bare, chitosan and TsCuPc modified GCE in presence of phosphate buffer solution with an acidic medium. The elevated oxidation peak current was noticed at less oxidation potential for + 0.55 V vs. Ag/AgCl at Chit-TsCuPc modified electrode under the optimized experimental conditions. The plot displays the peak current against NO2− with a good linearity in the concentration rangefrom 6.5 × 10−8 M to 5.0 × 10−10M. The linear regression equation is calculated to be Ip (μA) = 0.5291 + 1.4894C (NO2−), has a good correlation coefficient of 0.9949 and the detection limit of 22 nM (S/N = 3) with the current sensitivity of 4.964 μA nM−1 cm−2. The standard addition method was adopted to measure the unknown NO2− concentration in food samples.

AB - A stable chitosan protected tetrasulfonated copper phthalocyanine (Chit-TsCuPc) modified glassy carbon electrode (GCE) was used to aid the electrochemical detection of nitrite (NO2−) in food samples. The electrochemical oxidation of NO2− was investigated on bare, chitosan and TsCuPc modified GCE in presence of phosphate buffer solution with an acidic medium. The elevated oxidation peak current was noticed at less oxidation potential for + 0.55 V vs. Ag/AgCl at Chit-TsCuPc modified electrode under the optimized experimental conditions. The plot displays the peak current against NO2− with a good linearity in the concentration rangefrom 6.5 × 10−8 M to 5.0 × 10−10M. The linear regression equation is calculated to be Ip (μA) = 0.5291 + 1.4894C (NO2−), has a good correlation coefficient of 0.9949 and the detection limit of 22 nM (S/N = 3) with the current sensitivity of 4.964 μA nM−1 cm−2. The standard addition method was adopted to measure the unknown NO2− concentration in food samples.

KW - Amperometric detection

KW - Chitosan

KW - Food sample

KW - Limit of detection

KW - Nitrite

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Amperometry detection of nitrite in food samples using tetrasulfonated copper phthalocyanine modified glassy carbon electrode

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Keywords

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