This study outlines the development of a procedure for the determination of methylmercury by anodic stripping voltammetry at a gold nanoparticle-modified glassy carbon electrode (AuNPs-GCE) and for the differentiation between methylmercury and inorganic mercury. The signal of methylmercury was measured in the square wave mode using HCl as the supporting electrolyte. The procedure had good accuracy, repeatability and linearity. The determination of total mercury in solutions containing both methylmercury and inorganic mercury was performed after converting the former into the inorganic form. Different sample solution pre-treatments were tested for this purpose, and an acid digestion in a microwave oven with HNO3 and H2O2 was found to be the most effective. The selective determination of methylmercury in the presence of inorganic mercury was possible after masking the latter through reduction to the elemental state with SnCl2. The amount of inorganic mercury was determined by difference.

Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode

ABOLLINO, Ornella;GIACOMINO, AGNESE;MALANDRINO, Mery;MENTASTI, Edoardo
2009-01-01

Abstract

This study outlines the development of a procedure for the determination of methylmercury by anodic stripping voltammetry at a gold nanoparticle-modified glassy carbon electrode (AuNPs-GCE) and for the differentiation between methylmercury and inorganic mercury. The signal of methylmercury was measured in the square wave mode using HCl as the supporting electrolyte. The procedure had good accuracy, repeatability and linearity. The determination of total mercury in solutions containing both methylmercury and inorganic mercury was performed after converting the former into the inorganic form. Different sample solution pre-treatments were tested for this purpose, and an acid digestion in a microwave oven with HNO3 and H2O2 was found to be the most effective. The selective determination of methylmercury in the presence of inorganic mercury was possible after masking the latter through reduction to the elemental state with SnCl2. The amount of inorganic mercury was determined by difference.
2009
39
2209
2216
Methylmercury; Nanostructured gold electrode; Anodic stripping voltammetry; Mercury
O. Abollino; A. Giacomino; M. Malandrino; S. Marro; E. Mentasti
File in questo prodotto:
File Dimensione Formato  
OA_JACH410Voltammetric determination.pdf

Accesso aperto

Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 646.74 kB
Formato Adobe PDF
646.74 kB Adobe PDF Visualizza/Apri
2009_J Appl Electrochem_Voltammetric determination Abollino et al.pdf

Accesso riservato

Descrizione: Articolo principale
Tipo di file: PDF EDITORIALE
Dimensione 364.61 kB
Formato Adobe PDF
364.61 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/66787
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 36
  • ???jsp.display-item.citation.isi??? 32
social impact