Determination of temporary dye Basic Red 51 in commercial hair dye, river water and wastewater from hairdressing salon using graphite-epoxy composite electrode modified with magnetic nanoparticles

Autor(es)

Correa, Glaucia Tinoco ^[1] ; de Souza, Joao Carlos ^[1] ; Silva, Joao Pedro ^[1] ; Pividori, Maria Isabel ^[2] ; Boldrin Zanoni, Maria Valnice ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Inst Chem, Natl Inst Alternat Technol Detect Toxicol Evaluat, Dept Analyt Chem, Rua Prof Francisco Degni 55, BR-14800060 Araraquara, SP - Brazil

^[2] Univ Autonoma Barcelona UAB, Fac Sci & Biosci, Dept Chem, Barcelona 08193 - Spain

• Tipo de documento: Artigo Científico
• Fonte: Microchemical Journal; v. 159, DEC 2020.
• Citações Web of Science: 0

Resumo

The present work reports the development of a simple, fast and inexpensive method for the determination of Basic Red 51 (BR 51) dye, known to be widely employed in comercial formulations of temporary dyes. The method involved the use of graphite-epoxy magnetic composite electrode (GEMCE) modified by carboxylfunctionalyzed magnetic nanoparticles (CFMNs) for the pre-concentration of the dye aiming at increasing the electrode sensitivity through the application of square wave voltammetry. The pre-concentration of BR 51 occurs via strong interaction between charged imidazole group present in the dye and the carboxyl group in the magnetic nanoparticles. This reaction is the basis for BR 51 determination through a well-defined peak at +0.89 V vs. Ag/AgCl, which is attributed to the oxidation of tertiary amine after the transfer of one electron and one proton. Under optimized conditions, which consisted of 30 sec. exposure of the GEMCE/CFMNs to BR 51 dye immersed in phosphate buffer (pH 7.0), an analytical curve was constructed in the concentration range of 1.50 x 10(-6) mol L-1 to 5.50 x 10(-5) mol L-1 using square wave voltammetry (SWV). The limits of detection and quantification obtained were 1.19 x 10(-7) and 3.97 x 10(-7) mol L-1, respectively. The proposed method was successfully applied for the determination of BR 51 dye in samples of commercial hair dye, wastewater from hairdressing salon, and river water, and was validated using high performance chromatography coupled to diode array detector (HPLC-DAD). (AU)

• Processo FAPESP: 13/21542-6 - Nanopartículas magnéticas modificadas com tosyl e carboxilatos aplicados na determinação de corantes em cabelo
• Beneficiário: Gláucia Tinoco Corrêa
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/12998-1 - Métodos cromatográficos e eletroanalíticos aplicados na determinação de p-toluenodiamina e p-aminofenol em meio oxidativo usados em tintura permanente de cabelos.
• Beneficiário: João Carlos de Souza
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático