Square-Wave Voltammetric Determination of Nanomolar Levels of Linuron in Environmental Water Samples Using a Glassy Carbon Electrode Modified with Platinum Nanoparticles within a Dihexadecyl Phosphate Film

Author(s)

Marreto, Paola D. ^[1] ; Trench, Aline B. ^[1] ; Vicentini, Fernando C. ^[1] ; Figueiredo-Filho, Luiz C. S. ^[1] ; Medeiros, Roberta A. ^[2] ; Pereira, Ernesto. C. ^[1] ; Fatibello-Filho, Orlando ^{[1, 3]}

Affiliation

^[1] Univ Fed Sao Carlos, Dept Quim, Ctr Ciencias Exatas & Tecnol, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Oeste Parana, Ctr Engn & Ciencias Exatas, BR-85903000 Toledo, PR - Brazil

^[3] INCT Bioanalit, Campinas, SP - Brazil

• Document type: Journal article
• Source: AUSTRALIAN JOURNAL OF CHEMISTRY; v. 68, n. 5, p. 800-805, 2015.
• Web of Science Citations: 2

Abstract

A new sensitive method for linuron determination using a glassy carbon electrode modified with platinum nanoparticles within a dihexadecyl phosphate film (PtNPs-DHP/GCE) and square-wave voltammetry was proposed. The PtNPs-DHP/GCE was characterised by scanning electron microscopy and the diameter of the Pt nanoparticles was between 13 and 34nm. The electrochemical behaviour of linuron was studied using cyclic voltammetry and an irreversible anodic peak was obtained at a potential of 1.2V in 0.1molL(-1) phosphate buffer (pH 3.0) solution. The analytical curve, obtained by square-wave voltammetry after accumulation, was linear in the linuron concentration range from 1.0 to 74.0nmolL(-1), with a detection limit of 0.61nmolL(-1). This sensitive analytical method was successfully applied for linuron determination in environmental water samples with results that showed good agreement with those obtained using a comparative HPLC method. (AU)

• FAPESP's process: 10/20754-1 - Development of electrochemical sensors based on nanomaterials for the determination of interest pharmaceutical and environmental species
• Grantee: Luiz Carlos Soares de Figueiredo Filho
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 11/00601-9 - Application of boron-doped diamond and amorphous carbon nitride electrodes for the simultaneous determination of drugs of different therapeutic groups in pharmaceutical formulations and urine samples
• Grantee: Roberta Antigo Medeiros
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/16770-0 - SENSORS DEVELOPMENT BASED ON POLYMERIC FILMS AND NANOMATERIALS FOR SEVERAL ANALYTICAL APPLICATIONS
• Grantee: Fernando Campanhã Vicentini
• Support Opportunities: Scholarships in Brazil - Post-Doctoral