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DoE optimization of a mercury isotope ratio determination method for environmental studies.
Berni, Alex; Baschieri, Carlo; Covelli, Stefano; Emili, Andrea; Marchetti, Andrea; Manzini, Daniela; Berto, Daniela; Rampazzo, Federico.
Afiliación
  • Berni A; Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via G. Campi, 103, 41125 Modena, Italy.
  • Baschieri C; Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via G. Campi, 103, 41125 Modena, Italy.
  • Covelli S; Department of Mathematics and Geosciences, University of Trieste, Via Weiss 2, 34128 Trieste, Italy.
  • Emili A; Department of Mathematics and Geosciences, University of Trieste, Via Weiss 2, 34128 Trieste, Italy.
  • Marchetti A; Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via G. Campi, 103, 41125 Modena, Italy. Electronic address: andrea.marchetti@unimore.it.
  • Manzini D; Centro Interdipartimentale Grandi Strumenti (CIGS), University of Modena and Reggio Emilia, Via G. Campi 213/A, 41125 Modena, Italy.
  • Berto D; National Institute for Environmental Protection and Research (ISPRA), Loc. Brondolo, 30015 Chioggia, Italy.
  • Rampazzo F; National Institute for Environmental Protection and Research (ISPRA), Loc. Brondolo, 30015 Chioggia, Italy.
Talanta ; 152: 179-87, 2016 May 15.
Article en En | MEDLINE | ID: mdl-26992509
By using the experimental design (DoE) technique, we optimized an analytical method for the determination of mercury isotope ratios by means of cold-vapor multicollector ICP-MS (CV-MC-ICP-MS) to provide absolute Hg isotopic ratio measurements with a suitable internal precision. By running 32 experiments, the influence of mercury and thallium internal standard concentrations, total measuring time and sample flow rate was evaluated. Method was optimized varying Hg concentration between 2 and 20 ng g(-1). The model finds out some correlations within the parameters affect the measurements precision and predicts suitable sample measurement precisions for Hg concentrations from 5 ng g(-1) Hg upwards. The method was successfully applied to samples of Manila clams (Ruditapes philippinarum) coming from the Marano and Grado lagoon (NE Italy), a coastal environment affected by long term mercury contamination mainly due to mining activity. Results show different extents of both mass dependent fractionation (MDF) and mass independent fractionation (MIF) phenomena in clams according to their size and sampling sites in the lagoon. The method is fit for determinations on real samples, allowing for the use of Hg isotopic ratios to study mercury biogeochemical cycles in complex ecosystems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Análisis Factorial / Bivalvos / Contaminantes Ambientales / Mercurio Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: Talanta Año: 2016 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Análisis Factorial / Bivalvos / Contaminantes Ambientales / Mercurio Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: Talanta Año: 2016 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Países Bajos