On-Site Determination of Methylmercury by Coupling Solid-Phase Extraction and Voltammetry

A measurement and speciation procedure for the determination of total mercury (Hg ), inorganic mercury (Hg ), and methylmercury (CH Hg) was developed and the applicability for on-site determination was demonstrated. A simple, portable sample pretreatment procedure was optimized to extract the analyt...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2022-05, Vol.27 (10), p.3178
Main Authors: Inaudi, Paolo, Mondino, Elio, Abollino, Ornella, Malandrino, Mery, Argenziano, Monica, Favilli, Laura, Boschini, Roberto, Giacomino, Agnese
Format: Article
Language:English
Subjects:
Amberlite (trademark)
Analytical chemistry
Anodic stripping
Carbon
Chromatography
Dimethylmercury
Electrodes
Fish
fish product
Gold
Laboratories
Mercury
Methylmercury
on-site analysis
Onsite
Portability
Reference materials
Scientific imaging
Seafood
Solid phases
Sorbents
Speciation
stripping voltammetry
Tuna
Voltammetry
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Summary:A measurement and speciation procedure for the determination of total mercury (Hg ), inorganic mercury (Hg ), and methylmercury (CH Hg) was developed and the applicability for on-site determination was demonstrated. A simple, portable sample pretreatment procedure was optimized to extract the analytes. Home-made columns, packed with a new sorbent material called CYXAD (CYPHOS 101 modified Amberlite XAD), were used to separate the two forms of the analyte. Hg and CH Hg were determined by anodic stripping voltammetry (ASV), using a solid gold electrode (SGE). Two certified reference materials (BCR-463 Tuna Fish and Tuna Fish ERM-CE 464) and eight fresh fishes were analyzed. Then, the results that were obtained following the optimized portable procedure were compared with the concentrations obtained, using a direct mercury analyzer (DMA). This quantification, using the two techniques, demonstrated the good performance of the proposed method.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules27103178