Modified screen-printed electrode for the FIA-amperometric determination of 2-nitro-p-phenylenediamine

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Author(s):	Huayhuas-Chipana, Bryan C. ; Foguel, Marcos Vinicius ; Goncalves, Luis Moreira ; Sotomayor, Maria D. P. T. Total Authors: 4
Document type:	Journal article
Source:	Microchemical Journal; v. 131, p. 92-97, MAR 2017.
Web of Science Citations:	5
Abstract
This work presents the development of a modified sensor coupled to a flow injection analysis (HA) system for the determination of 2-nitro-p-phenylenediamine, an important compound in hair dyes. To achieve this, a commercial screen-printed gold electrode (SPAuE) previously electrochemically treated to become nanostructured, was covered with a self-assembled monolayer (SAM) of 3-mercapto-1-propanesulfonate (MPS) and, subsequently, was covered by multilayers of chitosan, sodium dodecyl sulphonate (SDS) and nickel(II) phthalocyanine-tetrasulfonic acid (NiPcTs) in a layer-by-layer technique to improve the sensor's sensibility. The analytical response of the proposed methodology was evaluated in batch by square wave voltammetry (SWV) and by amperometry coupled to a HA system, with limits of detection of 1.2 and 1.6 mu mol L-1, respectively. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process:	16/06926-0 - Development and application of new nanostructured chemical sensors and applications of new nanostructured chemical sensors based on biomimetic polymers
Grantee:	Maria Del Pilar Taboada Sotomayor
Support Opportunities:	Research Grants - Visiting Researcher Grant - International