Paper-based electrode using Cladophora cellulose-polyaniline composite for electrochemical quantification of toxic lead (II)

• Main Authors: Tan, Daisylyn Senna Y., Impas, Melanie Grace W., Camacho, Drexel H., Palisoc, Shirley T.
• Format: text
• Published: Animo Repository 2018
• Subjects: Cellulose; Lead; Electrodes; Cladophoraceae; Polyanilines; Anodic stripping voltammetry; Chemistry
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/1750
• Institution: De La Salle University

A simple method to accurately detect lead (II) in low concentrations is highly desirable. This study describes the fabrication of a paper-based electrode using Cladophora rupestris cellulose coated with polyaniline (PANI) for detection of toxic lead. Polyaniline was polymerized along the fibers of Cladophora cellulose, affording thin layers of PANI on cellulose, while preserving its highly crystalline nature. The composite was fabricated into a working electrode and the cyclic voltammetry (CV) profile showed the characteristic double peak of polyaniline. Following the optimization for the anodic stripping voltammetry (ASV) of Pb, the developed electrode had a linear working range of 0.2 ppm to 1.0 ppm and a low limit of detection at 0.348 μM (0.0721 ppm) for Pb 2+ in a low-cost platform. A comparison using standard atomic absorption spectroscopy (AAS) techniques showed no significant difference in detecting lead, highlighting the potential of paper-based electrochemical sensors for rapid water quality monitoring. © Editura Academiei Romane. All rights reserved.