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Issue 13, 2019
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Multiwalled carbon nanotube/ionic liquid paste electrode for voltammetric determination of sulfachlorpyridazine

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Abstract

In this study, voltammetric techniques have been applied to rapidly determine residues of sulfachloropyridazine (SCP) in milk samples. The electroanalytical methodology was developed using an electrode composed of a composite material of carbon paste modified with multi-walled carbon nanotubes (MWCNTs) and 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMIMBF4). Cyclic voltammetry (CV), differential-pulse voltammetry (DPV), and square-wave voltammetry (SWV) were used to examine the electrochemical behavior and characterize the redox process of this compound. Experimental conditions for the irreversible cathodic process observed at −0.655 V vs. Ag|AgCl in KCl (3.00 mol L−1) were optimized and analyses performed, with limits of detection (LODs) for SCP of 0.0854 mg L−1 in water and 4.65 mg L−1 in lactose-free milk. Furthermore, the recovery rates for different concentration levels within the investigated range varied between 98 and 105.7%. All assays conducted with milk samples did not require prior extraction steps or pre-concentration of SCP, making this novel methodology rapid, simple, and relatively cheap.

Graphical abstract: Multiwalled carbon nanotube/ionic liquid paste electrode for voltammetric determination of sulfachlorpyridazine

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Article information


Submitted
14 Jan 2019
Accepted
24 Feb 2019
First published
25 Feb 2019

Anal. Methods, 2019,11, 1743-1750
Article type
Paper

Multiwalled carbon nanotube/ionic liquid paste electrode for voltammetric determination of sulfachlorpyridazine

H. Aleixo, L. L. Okumura, A. Gurgel, A. F. S. Silva and J. A. Diniz, Anal. Methods, 2019, 11, 1743
DOI: 10.1039/C9AY00094A

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