Issue 10, 2009
From the journal:

Journal of Analytical Atomic Spectrometry

Total and inorganic mercury determination in biodiesel by emulsion sample introduction and FI-CV-AFS after multivariate optimization

Pedro R. Aranda,a   Pablo H. Pacheco,a   Roberto A. Olsina,a   Luis D. Martineza  and  Raúl A. Gil*a  

* Corresponding authors

a Instituto de química de San Luis, INQUISAL (UNSL-CONICET), Chacabuco y Pedernera, San Luis, Argentina
E-mail: ragil@unsl.edu.ar
Fax: +54 2652-425385
Tel: +54 2652-425385

Abstract

An automated procedure for total and inorganic mercury determination in biodiesel by CV-AFS was studied. The samples were introduced directly as oil-in-water emulsions in a flow injection manifold followed by cold vapor generation coupled to atomic fluorescence spectrometry (FI-CV-AFS). After irradiation with an UV source, organic mercury (e.g.MeHg+ and PhHg+ among others) was decomposed. Mercury vapors were generated using an acidic SnCl2 solution in a continuous flow system and were then determined. This strategy reduced sample handling, avoiding sample contamination and analyte losses. The limit of detection was calculated as 0.2 µg Kg−1 (0.03 µg L−1 for the emulsions) and the relative standard deviation was better than 8% at levels of 3.0 µg L−1 in the emulsion, calculated from the peaks obtained. The accuracy was verified by comparing the results with a total microwave-assisted digestion.

Graphical abstract: Total and inorganic mercury determination in biodiesel by emulsion sample introduction and FI-CV-AFS after multivariate optimization

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Article information

DOI
https://doi.org/10.1039/B903113H
Article type
Technical Note
Submitted
17 Feb 2009
Accepted
10 Jun 2009
First published
30 Jun 2009

J. Anal. At. Spectrom., 2009,24, 1441-1445

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Total and inorganic mercury determination in biodiesel by emulsion sample introduction and FI-CV-AFS after multivariate optimization

P. R. Aranda, P. H. Pacheco, R. A. Olsina, L. D. Martinez and R. A. Gil, J. Anal. At. Spectrom., 2009, 24, 1441 DOI: 10.1039/B903113H

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